April 25 Brendan T.

We started our class by getting back our tests and lab reports from February. Then, we opened up our blood lab sheets and went over our questions. Here is the link with the questions, but the answers are here.

1. You need to know your blood type in case you need a transfer, and you have to make sure you receive the right blood. If you don't, your blood will clog and you will die.
Skipped #2
3. AB
4. 0

5. An allele is a  form of a type of a gene. For example, height might be the gene. One form might be tall, and another might be short. We learned that co-dominance means that two alleles are dominant, as co means that two things have the same authority or power. A and B blood types are co-captains, because they are both dominant. Since I is dominant, then i must be recessive. But, since there are two types of dominant             (A and B), we have to put an ^Aor a ^B next to the I when expressing it.

Do your HW!

Brendan Turner
Blog #6
Go Hornets!

Science Class - 4/21/11

Today we reviewed that we use the letter I to represent  blood. We use uppercase letters to represent any dominant traits. We use lowercase letters to represent recessive genes. An example of a blood script would be I followed by a smaller capital letter next to it. That represents one allele. The heterozygous for blood type would be Ii. If it was a specific blood type, that letter would go next to the I. Mr. Finley also announced we would have a quiz on Tuesday. After that, we reviewed the Virtual Blood Typing Lab with our partner. We discussed some of the questions with our partner. It is important to know someone's blood type because it's important to know which type of blood you can get and which type of blood you can donate. A person with Rh+ blood can recieve from a person with Rh- blood. Although, an Rh+ blood can't donate to a Rh- blood person because the Rh- blood can develop Rh antibodies. Blood type O can donate to all types of blood: A, B, AB, and O, but it can only recieve blood from itself. Blood type AB can recieve from all the blood types. Here is a blood type chart:

HZ (5)

kATIE gOMEZ 8P

Today in class, all we were supposed to do was contiune the worksheet from yesterday and play a blood game.

Worksheet with website to go along with it :

Virtual Blood Typing Lab     
   
When you click on this either press open or save! 

Blood Typing Game Website:

http://nobelprize.org/educational/medicine/landsteiner/index.html

Katie Gomez Blog #5

April 18

First, Mr. Finley had us answer this question: If there are two heterozygous genes with tall being the dominant trait, what is the chance of getting a short child?

There is a 25% chance of getting a short child.

Punnet Square                                                     

                   T             t

                T  TT         Tt

                t   Tt          tt

After that, we did the Inspiron Gum Experiment.  Everyone had to take a piece of paper with the flavor on it and taste it.  Then we had to describe what it tasted like, if it was good or bad, and if it was strong or weak.  15 people said it tasted bad and 5 people said they couldn't taste anything.  After the experiment, Mr. Finley said that it wasn't a gum flavor it was a chemical.  Every slip of paper had the same thing on it and wheter you can taste it our not is a gene. 

He asked us these questions:

1. Is this trait dominant or recessive?

This trait is dominant because most of the class can taste it.

2. What are the pehenotypes?

The phenotypes are being able to taste it and not being able to taste it.

3. What are the genotypes?

The genotypes for being able to taste it are CC and Cc.  The genotype for not being able to taste it is cc.

Here is a link that tells you more about this chemical: http://www.britannica.com/EBchecked/topic/455706/phenylthiocarbamide-tasting

JR 5th blog

   

April 5

First, Mr. Finley came around to check our homework.  It was on watching the video about Punnett Squares.  Just so you know, if you didnt try making the squares, you should go back and do them. Today we began tallking about out genotypes.

Homework
YY->yellow                 SS->squarey
Y->yellow                    sS->square
yy->blue                       ss->round

Tall-TT, Tt                    Short-tt

Pink body-PP, Pp
Yellow body-pp
             
The Punnett Square (Spongebob)       

Ss	Ss
ss	ss

B. 2 out of 4 or 50%
C. 2 out of 4 or 50%

*Punnett Squares indicate nothing more than the CHANCES for 1 child!*

Homo->same
Hetero->different
Homozygous->CC, cc
Heteronzygous->Cc
Homozygous domaint->CC
Homozygous recessive->cc

Here is the link the the Pea Soup! experiment we have been working with!

Erica Wirth (5th blog)

4/1/11

Today, we talked about the pea plant experiment online. One parent was yellow and wrinkled and was Yy rr and the other was green and smooth and was yy RR. The children were all smooth and 2 were green and 2 were yellow. The green ones were yy rR and the yellow ones were Yy and rR. Then we figured out that you have to at least one capital R for it to be smooth and at least one capital Y to be yellow. To test this you can go to this website: http://sonic.net/~nbs/projects/anthro201/exper/experiment.cgi?begin=yes We also figured out how

 to get the r and y combinations by using the distributive property Ex. Parents yy yY

                                                                                                                     rr rR  y(yY)+y(yY) and doing the same with the Rs

                                                                                                                              yy yY yy yY

Or by using a tree diagram.

So you would pick a parent and choose one of the letters, and then from there you would choose another letter from the other parent and you have one child. You do that until you've made all possible combinations.





Noah Kudman #5

March 30

Today, Mr. Finley had us try to figure out what he wanted us to figure out why he asked us the homework questions after we went over it. We thought it was because some genes were recessive, as in they were in our parents but maybe didn't show up in them. Then they got passed down to us and we showed them. Mr. Finley asked the class who could make their tongue into a U, and almost everybody could. Then Mr. Finley said that we weren't exactly understanding the ideas of dominant and recessive genes, and he told us we would look at the pes again. We had to try to figure out the hypothesis that would allow us to predict the genetic combinations the children would have. Our hypothesis was that: To find the combinations of genes in the children, you need to combine the first gene with both genes in the second pea's genes.

March 29

Today, Mr. Finley announced we would get our tests back soon. The last person just took it. Then we started talking about growth. Mr. Finley had Rachel come up and compared them. Although they went through mostly the same processees, they were very different because they had different chromosomes. Then Mr. Finley made us do an activity on his website. We did the pea soup experiment. We had several pea plants with different combinations of chromosomes. We had to write down what we noticed about the peas and the simulation. Here's what I thought about the peas:

• Two parents


• Four children


• Both parents are brown


• Three children are brown


• One child is green


• Smooth and wrinkly textures


• Some parents and children are similar or identical


• They all have a combination of Y, y, R, and r chromosomes

This is what I noticed about the simulation:

• Use the radio buttons to mate two pea plants


• You can mate a plant with itself

Then we had to try and make a hypothesis that would allow us to correctly predict the kinds of peas that would be born when we breeded certain peas. My first hypothesis is that if you breed two plants with the same texture or color together, all the children will be the same texture and color. These were the results:

Parents: yellow smooth, yellow smooth

Children: Green smooth, yellow smooth, yellow smooth, yellow wrinkled

My next hypothesis was if there is at least one Y, it will be yellow. If there is at least one R, it will be smooth. If it's yy it is green, and if it's rr it will be wrinkled. Another hypothesis I had was that there will always be at least one exact copy of one of the parents among the children. These were both proven.

Parents: yy RR, yY Rr

Children: yy RR, yY Rr, yy RR, yY RR

We know now that all children will be made up of some combination of their parents' DNA. At the end of the period we figured out the hypothesis. Finley said we would talk about it the next day.

-LG Blog 4

3/28/11 Discussion on Meiosis

Today in class, Mr. Finley told us we were going to get our most previous test back as soon as the last person took their test. Talking about tests, we will have one, a week from tesday. Hopefully, before the end of the marking period(April 20) we will get back our lab reports.

Then, we continued off with our human example/simulation of meiosis which we left off on thursday(check thursday's blog if you are confused). We continued with prophaseII, in which the nucleur membrane disappears, chromosomes condense, and the two centrioles move to the opposite ends of the cell. After that, we decided to only focas on one cell because there were too many people. Then in metaphaseII the humans lined up on either side of the plate and the spindle fibers were attached to them. During anaphaseII, the people in the middle of the room (chromosomes) seperate (besty stage). Lastly, during telophaseII, the nucleur membranes reapear, forming four cells. We did not go over cytokinesesII because it was not neccasry, since everyone understood that the nucleaur membranes split...etc.

The more important discussion was when we started to take notes on reproduction! YAY! At first we talked about a single celled organism such as a peremecium cell and how it goes through mitosis to reproduce. We compared single cell reproduction to mutlicell reporduction, such as us humans. We said that the process of reproduction/meiosis starts off when two haploid cells( containing 50% DNA) such as an egg and a sperm cell, meet up in the same place at the same time. When the two cells join together, they form a zygote. After that, the zygote goes through mitosis to create more cells and to get bigger. The zygote starts to become into an infant. To add on, the infant goes through even more mitosis to become an adolescent. Especially during this time of a males life, around 12-17 years old, meiosis starts occuring in his testes. Keep in mind that mitosis is still hapening everywhere else in the body to repair and create more cells. Some key terms that you should know are that there are three different gametes(sex cells); eggs, sperm, and pollin. Continuing with the process of meiosis, when a adolecsent grows and becomes a man, he marries a woman and happily engages sexual intercourse. The purpose is to basically get the two halpoid cells in the same place at the same time. Once they meet and join they create a process called fertilization. Then the whole process of meiosis repeats. However, the main difference between a female going through meiosis than a male, is that she does it when she is in her stage of a zygote and an infant. Therefore, by now she would already be done with it.

I hope I have made you more clear on this topic that we learned today. If you have any questions, leave a comment and I will try my best to reply.

SK

#4 blog

Today we did an experiment directing and acting out meiosis. We have some people on tables acting as a cell membrane around the people who are inside acting as changing chromosomes. We are using string to symbolize spindle fibers. the string is attached to the chromosomes, that will pull apart the chromosomes. we used the people on the inside to made into chromosomes that then group into homologous pairs and we used the rest of the people on the inside are centriols. The homologous pairs are lined up along the equator in metaphase 1.The spindle fibers have attached to the homologous pairs.we acted out each step up to prophase and will continue on Monday. Above are example pictures of the simulation. See if you can identify what these stages are. "in comment"

Crossing over...

1)Crossing Over= two homologous pairs connect and exchange/switch a part of the homologous. Then a new cell is made.



2)Why are your siblings different from you?



You have different chromosomes because of crossing and everyone else because now we have different positives and negatives, so if everyone was exactly the same, only the same thing would be able to be contributed. This is called diversity.



Phases of Meiosis



1) Metaphase-Homologous chromosomes pair up and form tetrad



2) Anaphase I- Spindles Fibers move homologous chromosomes to oppisite sides



3)Cytokinsis II- Nuclear membrane reforms, cytoplasm divides, 4 daughter cells formed



4) Metaphase II- Chromosomes line up alomg equator, not in homologous pairs



5)Prophase I- Crossing over occurs



7)Anaphase II-Chromotids seperate

8) Metaphase I- Homologs line up alone equator.

9) Cytokinesis I- Cytoplasm divides, 2 daughter cells are formed.

R.R. #5

3-22-11-Today

First, we went over homework. The similarities and differences of meiosis and mitosis are:

Mitosis
metaphase 1 the actual chromosomes are lined up
100% of DNA at the end
asexual
2 cells are created
(diploid cells)
(skin cell)

Meiosis
more steps homologous pairs
exchange DNA
(called crossing)
(prophase 1)
metaphase 1
homologous pairs are lined up
50% of DNA at the end
sexual
4 haploid cells created
(gamete)
(pollen,sperm, egg)

Similarities
reproduction
both divide
DNA chromosomes similar stages
meiosis 2 is similar to mitosis
both deal with chromosomes not pairs

Then, we did a class demonstration, the homologous pairs line up, then trade DNA with eachother. They split into four different cells. One cell has all Will, another one has all Carter, another one has half Carter half Will, and another with half Will half Carter.

That was our discussion today.

This is my 4th time blogging
Lexi P8

March 18th, 2011 Carter Stumpf

First, to start of class we started discussing the homeowkr from last night. The homework was to anwser three questions on the website. The questions were 1. If egg and sperm cells merge how much chromosones will each one have? 2. How does this relate to homologous pairs of chromosones? and 3. Could we start with a normal cell, go through mitosis and get a sperm/egg cell? Why not?. A homologous pair of chromosones are a set of chromosones that represent the same traits. One chromosone comes from the sperm and the second one comes from the egg. Without one set of chromosones you could have disabilities. Sperm and egg cell combine to make the zygote. A normal cell can't go into mitosis and make a sperm cell because when it goes into mitosis the normal cell would want to make another copy of a normal cell not a sperm or egg cell so therefore it is not possible. The purpose of miosis is to only create a sperm or egg cell. Males only get miosis to start happening when they hit puberty and females are born with it completed. A stemcell is a cell that has deicided what it is going to be yet. Then, Mr. Finley passed out a handout talking about Meiosis. Eukaryotic cells can only reproduce asexually. Then the class ended with a suprise fire drill so therefore we had to finish reading the handout outside.

Rohan Mallya 3/17/11

Today, we learned how the first cell of a baby was created. Here are the steps:

1. First, the male and female must go through intercourse (sex). Remember: sex is not reproduction! It is merely a delivery meathod so that the sperm and egg cells are at same place at the same time!

2. Next, the sperm cell has to fertilize egg cell in the womb. During fertilization, the two cell literally merge together. The egg is always an "x" chromosome and the sperm is either an "x" or a "y" chromosome. Each cell has half of the 46 chromosomes (23 homologous pairs). But, we learned that when you go through sex, the woman does not always end up pregnant. This is could be because the woman used birth controls, which keep the the sperm and egg cells from being in the same place at the same time. Or, this could be because the spaerm and the egg are never end up being in the same place at the same time.

3. The first cell of the new organism is formed.

Finley told us that for plants, the sex cells are the egg and the pollen. The pollen is kind of like the sperm cell, but for plants.

Here's a video to clear this all up:
http://www.youtube.com/watch?v=UgT5rUQ9EmQ&feature=related

There might be some vocabulary you might not know.

Rohan

Science Class Period 8 3/16/11

Today we are finising up our presentations from yesterday. Mr.Finley checked our classwork/homework from yesterday. He is also checked the review from us picking the better simulation online. It was a video and then a video animation on youtube.com. If you didn't do the review, then you can do it tonight and turn it in for partial credit. Mr.Finley helped the groups move along with their presentations if they were having issues with their pictures or explantions. We went over the questions which were:

1) How does binary fission relate to cell division?
Binary fission and mitosis are both about the division of the cell, but binary fission seperates bacteria in prokaryotic cells. Cell division seperates eukaryotic cells.

2) What is a bud, and where does it form on an organism that reproduces asexually?
Budding is where a new cell starts to form on the side of a membrane of another cell, then it grows out the side, then after it is very large, it just seperates.

3) Compare sexual and asexual reproduction.
Sexual reproduction is different from asexual because in sexual reproduction, you need two cells, but in asexual reproduction, it reproduces faster, and it is only one cell. in sexual reproduction, the offspring looks similar to their parents. You would look identical in asexual reproduction since it's only one cell.

After we went over the questions we took notes on chromosomes in karyotypes. Which is a picture of your chromosones, and they are all single strands. They all have two strands. There are 46 all in total in the human body. There are 23 pairs of chromosones, the pairs are homologous, which means the same, they represent the same pair. Down syndrome is when we are missing one of the pair of chromosomes from the 21st pair. The pairs 1 through 22 we call autosomes. Sex chromosomes are either xx or xy. Xx is a girl, and xy is a boy.

March, 14th 2011 Talya

At the begining of class we had time to finish up our power points. Once we were all done with our power points Mr.Finley told us we had to present them. Each group presented their slide shows and Mr.Finley went over them. If any power point had some problems or incorrect information Mr.Finley asked the group what they saw was wrong with it and we would correct it together. Since we took about thirty minutes in groups to work on our power points and about ten minutes presenting them we didn't have time to do anything else. We also didn't have time to have every group go. Mr.Finley told us that it is not good to make your power point have too much going on. If you want it's okay to put a little movement but we shouldn't let it take over the presentation. Also, he didn't want us reading off of the board. He said it could be good to bullet point the main topics and then we could go deeper in them but it is boring for the audience to listen to us saying what they can read.

March 10th,2011 CJS

Today, to start off class we seperated into groups and discussed the classwork from yesterday. The classwork was that we had to read and anwser the questions on page 97 in the science textbook. The questions had to deal with looking at a graph which distributed the time of cell divison. Also, we had to design an experiment which had to deal with testing to see if cell divison happened faster in hotter temperatures. Then Mr. Finley started to go into detail about what happens in each stage of cell divison which are prophase, metaphase,anaphase, and telophase. First, we started with prophase. in the beginning of prophase, the nucleus breaksdown and dissapears. Then, the chromomatin coils up and turn into a chromosones.. A chromomatin is a strand of dna. Chromosones are dna coiled up. The last thing that happens in prophase is that the centrioles move to the opposite ends of the cell. Centrioles start to create spindle fibers as well. There are only two centrioles in the cell. Then we talked about metaphase. The first thing that happens in metaphase is that the spindle fibers get fully created. Next, the centrioles shoot out spindle fibers. Then, the spindle fibers connect to the chromosones in the kinetocore(centromere). A centromere(kinetocore) is the middle of the chromosone. Then the spindle fibers line up the chromosones in the middle of the cell. Then the next stage in the cell cycle is Anaphase. To start anaphase the spindle fibers pull the chromosones apart to opposite sides of the cell and they slowly start to break apart. Then telophase happens. In telophase the nucleaus starts to reform again. Then, the last part of telophase is if it is a plant cell it forms a cell wall and if it is an animal cell the membrane starts to break apart. Then class ended and that is where are notes for the day stopped.

CJS

Wednesday, March 9, 2011

Today in class we started off where we left off yesterday, the three groups. The first group was the textbook group we had to answer a few questions. To find the questions go to page 97 in the Cells textbook and answer questions 1-8.
After that we went to the group and went over the stages, cytokinesis, prophase, metaphase, anaphase, and telophase. We had a picture on the smart board and each cell was a different stage. Anaphase was when two cells are attached and are then pulled away from each other. An example to remember this is calling it the best friend stage. The best friends are being pulled away from each other. Another stage is prophase which is when a cell is crowded by a bunch of other cells. Metaphase is when the chromosomes line up. Telophase is when the nucleus is formed. Cytokinesis is seperation of the cell membrane. After that we watched the simulation, took notes, and drew pictures of each stage. To watch the simulation go to the following link:http://cellsalive.com/mitosis.htm Then after you watch the simulation take notes on the vocabulary and draw pictures of each stage.
-Simrin Kullar #4

3/8/11

Today we split up into to groups. There was one group that completed page 97 in the textbook. Here are the questions.

1. How long does growth phase of the cell cycle take? A. 1 hour B. 3 hours C. 8 hours D. 10 hours.

2. How much time does the cell cycle spend in interphase? A. 1 hour B. 10 hours C. 21 hours D. 22 hours

3. What is the total length of time it takes for the skin cell to complete one full cell cycle? A.10 hours B. 18 hours C.21 hours D. 22 hours

4. What phase of the cell cycle takes about 8 hours? A. DNA replication B. Mitosis C. Growth D. Preparation for cell division

5. Suppose another type of skin cell takes 44 hours to complete one cell cycle. If all of the phases are proportional to the length of time shown in the diagram, how long will the preparation for cell division phase last? A. 3 hours B. 6 hours C. 10 hours D. 20 hours

6. According to this diagram, what is the second stage in mitosis? A. Prophase B. Metaphase C. Telophase D. Cytokinesis

Then we moved to the next station and went over the worksheet labeled Examining Cell Division. Here are the answers

1. It needs to grow to get more water.

2.Chromosomes/DNA

3. You can see some cells about to split and some cells have two nuclei. Also the chromosomes are in weird shapes.

4. Results may vary.

Then we looked at different cells in an onion root slice. There were cells in it that were in each step of mitosis. Anaphase was demonstrated by Mr Finley and another student were together like best friends and then two other people pulled them apart. They had there arms out to each other saying "Besty":(. Mr Finley then called Anaphase the "Besties Stage" to help people remember. He also demonstrated Prophase by crowding a student. The student was supposed to be DNA. During Prophase, he uncrowded the student and they had room to move around.

-Noah Kudman #4

3/7/11 Blog

Today in class we were working on the worksheet we got last Friday. We used microscopes to look for cells in the process of mitosis. Some reminders with the microscopes are that when you are using low power, remember you are looking at a lot of cells instead of only one cell. The worksheet answers are:

1) You are looking at cross-sectional slices of the the tip of an onion root. Why might you expect an onion root tip to have cells that are dividing?

A: Since it's the root of an onion, it needs to expand to get water that's why the root needs to expand.

2) Find and look at all three of the slices briefly. What are the dyed objects inside of the cell?

A: For our group the dyed objects are nuclei.

3) Is there evidence of cellular division? Explain.

A For our group we said that yes because there were two nuclei.

For #4 you had to draw pictures of the cells and for #5 you had to use the pictures!!!

- Maria Cordero #4