If dominant C and P genes are essential for the development of purple color in Lathyrus odaratus flowers, what would be the ratio of purple and white color in a cross between CcPp x ccPp

3:5

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9:7

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2:6

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4:4

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Solution

The correct option is A 3:5
The punnett square is attached below. As this is a case of supplementary gene, the phenotypic ratio of the cross between CcPp X ccPp is as follows which will give the phenotypic ratio of 3:5.

So, the correct option is '3:5'.

Male/

Female

CP

Cp

cP

cp

Cp

CCPp

CCpp

CcPp

Ccpp

cp

CcPp

Ccpp

ccPp

ccpp

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