Question

2. For this problem, we’re going to be dealing with the F and J genes, both of which are located on chromosome 6.

a) You’re going to be performing a dihybrid testcross; tell me what the genotypes are for each of the parents involved in this cross.

b) Cool. List here the four different genotypic classes you’d see in the offspring of this dihybrid testcross. I’ll tell you the first one, since I’m going to put it in the next question. genotypic class #1: f/f j+ /j genotypic class #2: genotypic class #3: genotypic class #4:

c) OK, OK. So, f/f j+ /j is one of the recombinant genotypes. What’s the other recombinant genotype?

Answer 1

Answer 2)

In test cross, the unknown parent is crossed with homozygous recessive parent. Now, it is given that there are four types of genotyoes in offsprings. This suggests that the parent has f+ f/ j+ j

The homozygous recessive parent genotype is f f / j j.

A)

parents genotype is: f+ f / j+ j and f f / j j

B)

please look in the image:

C)

Now the recombinant genotype is f+ f/ j j