Reebops project

GENETIC VARIETY

Genetic variation is a good thing because it makes all animals different. This is because they get some genes from their mom and some genes from their dad. If the child only got the genes from one partent then the parent and the child would look exactly alike.

This is one of the reasons there is crossing over in the during the process of meiosis. This is when one of chromotid crosses ove to another chromosome. They also switch the chromotid with another chromotid.

When we made our Reebops, each generation of Reebops added a few new colors. This is because the new generation is made up of the mom's genes and the dad's gene. Then when a new generation of Reebops come they have their parents genes who have their parents genes etc.

if i could go back in time and tell my self about dihybrid crosses i would say that you use it for when you want to use it for more then one trait. for example you would use it for color and shape. this would make it easier then making 2 punnet squares. one for shape and one for color. this way you can determine what the chance is to have yellow skin with a square shape,etc. lastly it has to do with the parents genotype.

you might want to use this when you need to have multiple traits determined. for example, the possiblity that your child is going to have blonde hair and blue eyes or brown hair brown eyes.

Hi me. you will need to know that in the process of meiosis there are many phases. the names are...

• prophase I


• metaphase I


• anaphaseI


• telophase I


• prophase II


• metaphaseII


• anaphase II


• telophase II

i know that you will want to call the first 4 (prophase I, metaphase I etc.) with out the "I" at the end but it is really important. also you will want to make sure to go over that in the process of meiosis that ONLY egg, sperm, and pollen cells are made. also these are haploid cells or have HALF the numbers of chromosomes then a diploid cell.

be sure to pay attention during the simulations because they really help to visualize it.

this week we learned about meiosis. the phases are..

• prohase I-non-sister chromotids connect and trade sections.
• metaphaseI- spindle fibbers attach to each dyad at the kinerachore.
• anaphaseI-chiasmata break apart and sister chromotids go to migraring towards oppiste poles
• telophaseI-cleavage furrow forms. cell splits
• prophaseII-spindle formation begins.
• metaphaseII-tension from spindle fibers
• anaphaseII-chromotids separate and begin moving to the poles
• telophaseII-cleavage furrow forms

meiosis is important in sexual reproduction. meiosis makes sperm and egg cells.

we also learned a new vocabulary word.

• autosomes-all the other 22 pairs of chromosomes that aren't the sex chromosomes.

the sex chromosomes are called x and y. the males carry either the x or y chromosome. females only carry the x chromosome. if you get 2x's then the baby would be a girl. if you get a x and a y then it would be a boy.

this week in science we learned some new vocab.
chromatin's-unraveled DNA
chromosomes-organized DNA
chromotids-two chromosomes or sister chromosomes that form an "x" shape
centreol- create spindle fibbers
also we learned that it depends on the cell how many times it goes through its life cycle. for example, skin cells have a very fast life cycle when a heart cell's is very slow. in a cells life cycle a few things happen

1. they grow
2. replicate
3. mitosis

mitosis is basically when the cell splits into 2. it has 4 stages but some people say 6. the 4 main stages are...

• prophase
• metaphase
• anaphase
• telaphase

the two others are...

• interphase-before the 4
• cytokinesis- after the 4

this week in science we started a new unit on reproduction. on the first day we go three questions. they were

1. how do organisms reproduce?
2. how do cells reproduce?
3. how is sex different then reproduction?

we started with the 3rd one. sex is like a cell delivery service. it is 50% sperm and 50%egg. it doesn't necessarily end with of spring.

then the answer to the first on is by using sperm and egg. then it splits into two parts.

then the second answer is by splitting the cell makes a copy of org.

then a reproducing cell has two nuclei. a cell that is suppose to split has a very big nucleus. a regular cell has a regular size nucleus.

there are 5 stages of mitosis. they are...

• inter phase
• pro phase
• meta phase
• alphas
• televise
• cytocanisis

This week we were basically getting ready for the test tomorrow. we did a lot of reading to review stuff. when we were reviewing we were also making analogy's with organelles in a cell to the outside world. For example the cell membrane is like the door because it lets stuff in and out.with a partner we also made a table. it has all the organelles and their functions. lastly we had a DNA review sheet. basically this week we just review stuff for the test.