Reference no: EM132249289 , Length: 1900 Words

Assignment -

1. What is the probability that each of the following pairs of parents will produce the indicated offspring? Assume independent assortment of all gene pairs. Hint: remember to do the calculations for each allele separately. For example, what is the probability that AA x aa will produce Aa?

What is the probability that a cross of a being s with genotypes AA and aa (AA x aa) producing a child with the following genotypes? (use fractions!)

AA

aa

Aa

Now let's look at the probability of dihybrid crosses. What is the probability of the following offspring from a cross of AABB x aabb. Again use fractions when appropriate.

AABB?

aabb?

AAbb

AaBb

a. AABBCC x aabbcc → AaBbCc

b. AABbCc x AaBbCc → AAbbCC

c. AaBbCc x AaBbCc → AaBbCc

d. aaBbCC x AABbcc → AaBbCc

2. a. What is the genotype of a person with blood type O?

b. if a person with blood type O has children with a person with blood type AB what are the possible blood types of their children? Show how you arrived at your answer.

3. A pregnant woman is worried about the chances of her child having hemophilia as both she and her husband have paternal grandfathers with hemophilia. Neither their parents nor their maternal grandparents have hemophilia.

What is the genotype of the paternal grandfathers who have hemophilia?

What is the genotype of their grandmothers and grandfathers without hemophilia?

Which of the pregnant couple's parents could carry the gene for hemophilia?

Does (or can) either of the pregnant couple carry the gene for hemophilia?

What are the possible genotypes of the couple?

Which is the likelihood that their child will have hemophilia?

How would things change for the couple's genotypes if their maternal grandfathers had hemophilia and their paternal ones didn't?