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Genetics - Form VIII- Sex-Linked Genes

When you click Submit (at the bottom of this web page) it will save your work on the server for me.

DO NOT Click submit more than once!

TAB OR USE THE MOUSE Between the fields....

You are encouraged to work in small groups (pairs or threes). You will only have to submit one paper per group (with all the names!)

In the computer log on as “River” password: “Deep” in the Domain “this computer”

You will want to keep this window open while you work on Riverdeep. To do this you should open Riverdeep in a new window.

Click on “Start” then “Programs” then “Riverdeep Logal Express” then “Riverdeep Logal Express”

Click on “High School Science Gateways” then “Biology” then “Principles of Genetics”

Start with “Sex-Linked Genes” and read and do everything on the site. However while you need to fill in the tables on the site to figure things out, you do not have to answer the questions in the boxes on the site. Below you will find boxes with some of their questions, and some of my own. You will be graded on these answers.

Answer the questions as best you can. The boxes will expand as you type if you need more space. (Don't worry if it is a one word answer. The box size is standard.)

Name:

Class Period

1 2 3 4 5 6 7

Question 1: What are the possible genotypes of red eyed female flies?

Question 2: What are the possible genotypes of white eyed female flies?

Question 3: What are the possible genotypes of red eyed male flies?

Question 4: What are the possible genotypes of white eyed male flies?

Question 5-6: Fill in the Punnett Square for the cross of a heterozygous red eyed female fruit fly and a white eyed male fly.

For each of the empty boxes enter the Genotype and the Phenotype and gender and if it is heterozygous or homozygous or hemizygous (only 1 gene for a trait). I have done half the square for you.

  X-A X-a
X-a X-A X-a

Red eyed

female

Heterozygous

5
Y X-A Y

Red eyed

Male

Hemizygous

6

 Remember, the boxes will expand as you type if you need more space.

Question 7: For humans one form of color blindness is sex-linked (as are Duchene's muscular dystrophy, hemophilia, and many other conditions.) If a man has a color blind father and his mother is homozygous for normal color vision can he be color blind? Explain.

Question 8: For humans one form of color blindness is sex-linked (as are Duchenes’s muscular dystrophy, hemophilia and many other conditions). If a woman is color blind and her mother is heterozygous for normal color vision  what can you say about her father?

 

      

This web page is being hosted at Dr. Gottfried's  Tripod account. Technical questions should be referred to mgottfried@dadeschools.net