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Question

Given below is a schematic diagram showing Mendel's experiment on sweet pea plants having axial flowers with round seeds (AARR) and terminal flowers with wrinkled seeds (aarr).



(iii) Give the phenotypic ratio of F2 progeny.


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Solution


AaRrAaRr AR Ar aR ar
AR AARR(axial round) AARr(axial round) AaRR(axial round) AaRr(axial round)
Ar AARr(axial round) AArr(axial wrinkled) AaRr(axial round) Aarr(axial wrinkled)
aR AaRR(axial round) AaRr(axial round) aaRR(terminal round) aaRr(terminal round)
ar AaRr(axial round) Aarr(axial wrikled) aaRr(terminal round) aarr(terminal wrikled)


(iii) Phenotypic ratio of F2 progeny is 9:3:3:1.

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