Low platelet count is a recessively inherited trait Reevalua

Low platelet count is a recessively inherited trait. Reevaluation of the genetic screen indicates that Tiffany is homozygous dominant normal for a trait that causes low platelet count and her husband is homozygous recessive. If the F1 offspring has normal platelets and beta-thalassemia... (This is a dihybrid)

a. What are the parental gametes?

b. Based on the F1 progeny phenotype given and the parental gametes, write the two possible genotypes.

c. What is the gamete frequency if the two genotypes in (b) were crossed with each other?

Solution

a)The parent games can have A homozygous pair can be either dominant (AA, BB) or recessive (aa, bb)

bThe following genotypes are possible (AA, aa)

c)The frequency is 1:1 (dominant to recessive ) and vice versa.