Essay Help

On question 2, where it asks you to find the genotypes of the parents. Do a test cross on the F1 generation.

Example: If you know a plant has the tall trait, you have two choices of the genotype. (TT or Tt)

To do a test cross you would cross it a recessive plant (tt)

If the phenotype of the offspring is 100% dominate you know the parents genotype is (TT).
If the phenotype of the offspring is 50% dominate and 50% recessive you know the parents genotype is (Tt).

Do a test cross (using Punnett square) on the parents and compare results with the observed F1 generation and you will be able to tell the genotype of the P generation.

Hope this helps.

Mrs. Stebly

Essays

I have copies of the rubrics. I will give them out tomorrow.
Mrs. Stebly

Chi Square Quiz

Any questions??

Extra Credit

McKenzie Irish is collecting items for the Gulf Coast Women's Center for Nonviolence. I got the paper yesterday and realized she is picking up the things tomorrow (Wed. Sept. 17). Toys, Clothes, Toiletries for infants thru teens. Bonus points will be given out for items brought in. Pass the word to anyone not on the blog if you can.

Mrs. Stebly

Chi-Square Lesson Tomorrow

This is part of our fly lab.
Be prepared to start as soon as everyone gets into class.
Mrs. Stebly

Ch. 14 Test Grades have been posted!

Great Job - 56% of you made A's.
81% of you passed.

See you Monday.
Mrs. Stebly

AP Test Review Ideas Needed

I would like your suggestions about times for AP Test Review.
I was thinking we could try some weekend time (I know we should be resting) or after school some days.
Please give me some feedback.
Thanks,
Mrs. Stebly

Great Job Today Everyone!

I felt that we had a successful day.
Tomorrow you will take the 2nd half of your test and then make fly observations before the weekend.
I am also giving out the ch. 15 outline.
See you tomorrow.
Mrs. Stebly

Tomorrow and Friday's Plan

Tomorrow:
Stephanie Brauchle is coming by to help those who need it for this blog.
We will also go over pedigree and a quick review.
I will give you the first 1/2 of the test to work on until the end of class.
Friday:
You will get the second 1/2 of the test to finish and then we will work in the lab.
Pass the word.

Mrs. Stebly

Fruit Fly Confusion

Today was chaotic - fly lab, President's speech that would come through!

It was brought to my attention that some of you are confused. Yes, this is a difficult lab that is why you need to not only listen to oral directions but read your lab packet.

Each day we go into the lab you will need to record everything you observe and do. I know some of you have been out sick and you will have to get any missed information from your lab partners.

Before we finish ch. 14 notes, I will quickly overview the lab.

Mrs. Stebly

A Special Thank you to Mary!!

Great job on Friday Mary. Thanks for explaining the multiplication and addition rules applied to genetic crosses.

Everyone enjoy your Labor Day!
See you Tuesday.
Mrs. Stebly

Stop, Drop and Reproduce(Flies)

Great day today - we got alot accomplished.
I checked all the flies before I left school, I put netting in the vials that did not have any. I realize that you took all of the flies out of some of them, but I put it in just in case some more flies hatched.

Test
Have questions ready for test. On sections 14.1 and 14.2 only.
I will give you a little class time to review before the test.
Only 20 questions - I think everyone will do great

Homework Post revisited

The last post did not post my chart the way I typed it. I will try again.

Individual ------------------------- Possible Gamates

AABB ---------------------------------- AB
AABb --------------------------------- AB,Ab
AaBB --------------------------------- AB,aB
AAbb --------------------------------- Ab
aaBB --------------------------------- aB
aaBb --------------------------------- aB,ab
aabb --------------------------------- ab

I hope this works.
Mrs. Stebly

Homework

First of all I left my sheet at school :(
When asking a question, you will need to be specific.

I think the first part of that paper is asking to find how many possible gametes. If they are here is an example that might help

Individual Possible gametes
AABB AB
AABb AB,Ab
AaBB AB,aB
AaBb AB,ab
AAbb Ab
aaBB aB
aaBb aB,ab
aabb ab

Let me know if you are having problems.
Mrs. Stebly

Dominantly Inherited Disorders

On page 267 in our text, they discuss the form of dwarfism called achondroplasia. It is Dominate Inherited Disorder. But the reason less than 1% of the human have it is because the recessive allele is more prevalent in the human species.
Just because an allele is dominate over the recessive allele doesn't mean that more people carry the dominate allele.
Hope this helps.
Mrs. Stebly

Mendel Chapter aka ch. 14

Great questions today! Jesse - we discusses Mary's questions from other post.
Bellwork will be another dihybrid cross - with interesting results!
Have a good evening.
Mrs. Stebly