NEET Biology question

In the F2 generation of a Mendelian dihybrid cross, the number of phenotypes and genotypes are

(A)Phenotypes-4; genotypes-16
(B)Phenotypes-9; genotypes-4
(C)Phenotypes-4; genotypes-8
(D)Phenotypes-4; genotypes-9Correct

Answer: (D)

Solution

A dihybrid F2 cross ( selfed) produces the standard phenotypic ratio 9:3:3:1, which comprises exactly 4 distinct phenotype classes. The underlying genotypic ratio is

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Question ID VK-120401