Principle Of Inheritance And Variation Question 247

Question: If enough crosses are made between male flies of the genotype ‘Aa’ and the female flies of the genotype ‘aa’ to produce about 1000 offsprings. Which one of the following is the most likely distribution of genotypes in the offsprings

Options:

A) 250 Aa : 750 aa

B) 750 Aa : 250 aa

C) 243 AA : 517 Aa : 240 aa

D) 481 Aa : 519 aa

Show Answer

Answer:

Correct Answer: D

Solution:

Crossing of Aa with aa is a test cross which produces the ratio of 1 Aa : 1 aa.