Question

Genes A, B, and C are linked on a chromosome and found in the order A-B-C. Genes A and B recombine with a frequency of 6%, and genes B and C recombine at a frequency of 26%. For the cross a + b + c/abc + × abc/abc, predict the frequency of progeny. Assume interference is zero.

a. Predict the frequency of a⁺b⁺c progeny.

b. Predict the frequency of abc⁺progeny.

c. Predict the frequency of a⁺bc⁺progeny

d. Predict the frequency of ab⁺c progeny.

e. Predict the frequency of a⁺b⁺c⁺ progeny.

f. Predict the frequency of abc progeny.

g. Predict the frequency of a⁺bc progeny.

h. Predict the frequency of ab⁺c⁺progeny.

Answer 1

Ans:

a. Predicted frequency of a+b+c progeny = 34.78%

b. Predicted frequency of abc+ progeny = 34.78%

c. Predicted frequency of a+ bc+ progeny = 2.22%

d. Predicted frequency of ab+c progeny = 2.22%

e. Predicted frequency of a+b+c+ progeny = 12.22%

f. Predicted frequency of abc progeny = 12.22%

g. Predicted frequency of a+bc progeny = 0.78%

h. Predicted frequency of ab+c+ progeny = 0.78%

All the calculation are given below-