Question

Which of the given test crosse will produce the maximum possible phenotypes in offsprings?

• A. AABb $\times$ aabb
• B. AABB $\times$ aabb
• C. AaBb $\times$ aabb
• D. AaBB $\times$ aabb

Answer 1

The correct option is C AaBb $\times$ aabb

The correct answer is option C.

In a cross between :- AaBb ×× aabb

Parent with genotype AaBb would produce four types of gamete:- AB, Ab, aB, ab.

Parent with homozygous recessive genotype aabb would only produce one type of gamete: ab

AB Ab aB ab

ab - AaBb Aabb aaBb aabb

Phenotypic ratio and genotypic ratio both would be - 1 :1 : 1: 1 .