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Question

In quantitative inheritance, when a character is controlled by two pairs of genes, the ratio obtained in F2 generation is

A
1 : 2 : 1
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B
1 : 4 : 6 : 4 : 1
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C
9 : 3 : 3 : 1
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D
1 : 6 : 15 : 20 : 15 : 6 : 1
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Solution

The correct option is B 1 : 4 : 6 : 4 : 1
  • Skin color is quantitative or polygenic inheritance. Consider a cross between a negro and a white.
  • The offsprings born in the F2 generation will be 1 negro, 4 dark, 6 medium, 4 light and 1 white skinned.
So, the correct answer is option B.

676863_633973_ans_2aba0b10f40e43639cea5c30233037a9.PNG

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