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57. In a cross between negro and albino skin colour of
humans showing polygenic inheritance, the phenotypic
ratio in F2 generation will be
(a) 9:3:3:1
(b) 1:6:15:20:15:6:1
(C) 1:4:6:4:1
(d) 1:2:2:4:1:2:1:2:1
offenrinar obtained from cross
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Answer is B
1:6:15:20:15:6:1
azkairamfatima:
how?
AABBCC. x. aabbcc
(Pure black). (Pure white)
Offspring will be AaBbCc
And the self crosss the offspring with itself and then the ratio will come
(Pure black). (Pure white)
Offspring will be AaBbCc
And the self crosss the offspring with itself and then the ratio will come
thanks
anytime
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