Question

question 4
why would you preform a testcross?
a to determine the unknown genotype of an individual
b to test the viability of the offspring
c to determine the the genotype of both unknown parents
d to see if the parents could have offspring
7 points
question 5
the h gene produces a protein that allows the a and b antigen to attach to the surface of a red blood cell. this is an example of
a epistatic trait
b polygenic trait
c incomplete dominant trait
d x linked trait

Explanation:

A test - cross is a cross between an individual with an unknown genotype and a homozygous recessive individual to determine the unknown genotype. The H gene's role in allowing A and B antigen attachment is an example of epistasis, where one gene affects the expression of another gene.

Answer:

Question 4: A. To determine the unknown genotype of an individual
Question 5: A. Epistatic trait