Homework Answers
Ans) Option (b) is correct.
When two genes with two alleles each are 30 centimorgans (map units) apart. A double heterozygote is crossed to a double homozygote. 35% frequency in the progeny will be double homozygotes.
30 centimorgan means there is a 30% chance of occurrence of
crossing over between those two genes
So what would be the chance of not a crossing over? 100 - 30= 70
%
Double heterozygote means heterozygous at 2 locations. Hence for 2
locations 70÷2=35%.
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