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In a polygenic cross Aa Bb Cc xx Aa Bb C...

In a polygenic cross Aa Bb Cc `xx` Aa Bb Cc, the phenotypic ratio offspring is `1 :6: 'X':20:X:6: 1`. What is the value of 'X'?

A

7

B

9

C

15

D

25

Text Solution

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The correct Answer is:
C
In a polygenic trihybrid cross (AaBbCc `xx` AaBbCc) the phenotypic ratio is 1:6:15:20:15:6:1.
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