Bug week!

This week we worked on our bugs. We finish all of them. The last one was the F3. By the F3 three, the genotypes had about four different colors. When we finished, Mr. Finley picked some of us to read off all of the colors. The colors stood for each person that was in your bugs genes. Once you read off all of the colors, you could then see who is in your bugs' family. This shows how all of the genes are passed down. This could help with genetic variety because you can see how many different people are in your genes.

This week we also worked on our science projects.

Genetic Variety

Genetic Veriety played a very important role when creating my Reebop family. Without genetic variety, every body would look the same. This is because of genotypes. Genotypes is what gives people their hair color, eye color, and every other trait. For example, when I mated my bug with an other bug, we had to match there genes for the eyes, antenas, legs, wings, and dots. If the genotypes for the antenas were the same, then the antenas would be the same. Most of the time, every part of the two bugs had genetic variety. Then the phenotypes(physical traits) will be different. The two bugs in the picture are the parents of my F1. My F1 is in the picture next to them. Do you see how it looks different from them? That is because of genetic variety. It still has some of their traits.

SSCCIIEENNCCEE

On Monday we had a snow day!!!!

On Tuesday we made a chart of the 7th grade science class traits. Then we used the results to show what traits are dominant and recessive. For example, being able to taste a PTC taster would be a dominant trait. It only takes one dominant alleles to be dominant. For home work we had to answer if you could tell that somebody is heterozygous by a trait. You can't tell because you would have to see the alleles.

On Wednesday we went over our charts and figured out what traits are recessive and what traits aren't.

On Thursday we took our egg and sperm cells that we made for home work. We put traits on them and then put them in a cup. This was to prepare for our lab on Friday. It was to support our predicted punett squares. We would pull out an egg and sperm and match the traits four times. Then we compare the results to our original punett squares.

On Friday, we did the lab that I explained. My groups expected punett squares matched our results. Then we tried one trait again and I did not match.

I think that we did this because we needed to see how traits get passed on from generation to generation.

Sciencio weeko.......[:{)-I-(

This week in science we learned about how traits of people work. For example, if a pea is yellow, and the other pea that it is breeding with is yellow, then the children are likely to be yellow if they are both homozygous. This means that the alleles are both dominant. Alleles are traits that can not be seen. A genotype is a set of alleles. A phenotype is a trait that you can see such as brown eyes. For example, brown eyes are more dominant than blue eyes in my family. This means that most of my family members have brown eyes. To figure these problems out, you can use something called punit squares. Punit squares match up alleles to see different traits of people families. For example, if brown eyes are more dominant than blue, Brown would be BB as there alleles. Blue would be bb. These are homozygous, meaning the same alleles. If brown was heterozygous, the alleles would be Bb. They are still brown though because whenever there is one dominant allele in the genotype, it will be the more dominant trait. The only time you will get the recessive trait is when there are two recessive alleles such as bb.

BB-Dominant trait- homozygous
Bb-Dominant trait- heterozygous
bb-recessive trait-homozygous

If your dominant trait is blond hair, and recessive trait is brown hair
And alleles are BB and bb
The four off springs would all be Bb
There for all of the off springs would have Blond hair because there is a dominant trait in all four of the genotypes

sCiEnCe ClAsS

This week we learned about meiosis. Meiosis is sexual reproduction. It is where sex cells are made. The chromosomes go through DNA replication and then split into two new cells. They are now haploid cells because they have 50% of the DNA. It started out with diploid, when it had 100% of the cells. After the chromosomes split, they split again into four sperm cells. We also learned about homologous pairs. These are two of the same pairs of chromatids. In meiosis, the chromosomes have to switch parts of theselves do replicate. Unlike mitosis, the chromosomes are lined up on either side of a plate in the cell. Then they are pulled apart by the spindle fibers.
Another difference between mitosis and miosis is that meiosis has double the stages. For example, there is a prophase1 and prophase2. This is because they make two cells and then they make four. When they replicate for the first time, it is the first stage. The second replication is the second stage.

This weeko in sciencio

This week in science on Monday, we went over the mitosis worksheet. We learned each phase of mitosis. (Interphase, prophase, prometaphase, metaphase, anaphase, telephase, cytokinesis, and interphase). We learned what each phase was and how they were related. This is important because all of them together show how cells divide. On this week we learned alot about chromosomes.

Chromatin-unwound DNA
Chromatid-wound up DNA
Sister Chromotids-two connected chromotids
Centromere-Thing that connects sister chromosomes
Sister Chromotids that are connected by centromere make a chromosome
centrosomes are centrioles after they are split apart
We also learned that a karyotype is a picture of all your chromosomes
The two chromotids are called the mother and father chromotids

All of these terms help us understand mitosis better

We also made a concept map of mitosis terms. That helped us relate each term.

SSSSCCCCIIIIIIEEEEENNNNCCCEEE

We had no school on monday, On tuesday we watched the Presidential inaugeration. On wednesday, we had a test. That narrows it down to thursday and friday. On thursday, we went over the lab. This was the onion root lab. We saw the different phases of the cell replication. This is important because it shows how we make more cells. The cells double their chromosomes and make another cell. On Friday, we learned that the correct term for this was called mitosis. Then we did a cell simulation of the different phases of mitosis on the computer. I learned that spindle fibers pull apart the chromosomes and make new cells with just the right amount of chromosomes in each cell.