the data shown are based on laboratory of male drosphila showing the inherited bar-eye phenotype. which is the best conclusion to be made from an analysis of these data?

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

the answer is :

the correct answer is d