Answer to Question #164749 in Genetics for Kenichi

Question

How many crosses should you to produce a beige cat with no stripes if you currently have a beige cat with stripes (ggDd) and a Grey cat without stripes (GGdd). Determine the generation where your ideal cat will appear.

Let

G=Grey

g=Beige

D=with stripes

d=without stripes.

Answer 1

We need to make two crosses to produce the cat of our desire which is beige cat with no stripes (ggdd).

So, in F2 generation, we will get the cat with desirable characteristics.

The parents are:

1. beige cat with stripes (ggDd)

2. grey cat without stripes (GGdd).

The gametes of parent cat are as:

Cat-1: gD and gd

Cat-2: Gd

After fusion of the above gamete, F1 generation will have the following offspring cats:

a. GgDd

b. Ggdd

Upon, crossing the F1 generation cats, we will get the desired cat with the genotype "ggdd" having the characteristic beige and no stripes.

Summary of the crosses are as follows:

The answer is: After two crosses and in the F2 generation, you will get your desired cat.