A Two-Point Testcross is a Cross Between

Question

A two-point testcross is a cross between
A)a double heterozygote for two linked genes and a double recessive genotype.
B)a heterozygote for one of two linked genes and a double recessive genotype.
C)a double heterozygote for two linked genes and a homozygous dominant genotype.
D)a heterozygote for one gene and a homozygote for another.
E)individuals with two different genetic markers.

Accepted Answer

A two-point testcross involves crossing a double heterozygote for two linked genes with an individual that is homozygous recessive for both genes. This is used to study the linkage between the two genes and the frequency of recombination.