Question

6. Six-factor eross (4 Points) A, B, C, D, E and Fare six independently assorted genes. What is the probability of having a progeny that shows dominant phenotype for all six traits from the cross shown below? aa Bb Cc Dd EE ff Aa BB Cedd ee FY X 7. Hemophilia (8 Points) Gail's uncle from her mother's side has hemophilia, a rare X-linked recessive trait that afflicts men more frequently than women. What is the probability that Gail will have a son with hemophilia?

Answer 1

6.

AaBBCeddee FF x aaBb Cc Id Efff +

Probabity of domenant phenotype. ع : م م ج ت ي ce - Dod e f f = 4

Addition of all the dominant phenotypes will give the total dominant phenotypes:

1/64 + 1/ 32 + 1/64 + 1/32 = 6/64 = 3/ 32

Probability of dominant phenotype for all the genes is ---3/32.