The Mouse Autosomal Genes B and S Are Linked and 38

question 39

Multiple Choice

The mouse autosomal genes B and S are linked and 38 map units apart.Genotypes B S/B S and b s/b s are intercrossed,and the F₁ is testcrossed to b s/b s.The proportion of B-S- progeny will be:

• A)0.19.
• B)0.31.
• C)0.50.
• D)0.38.
• E)0.76.