Question

If you cross a plant Gg (G = yellow, g = green) Ww (W = round,...

If you cross a plant Gg (G = yellow, g = green) Ww (W = round, w = wrinkled) with another
GGww What will be the expected phenotypic reasons for the crossing? Assume inheritance of complete dominance.
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Answer #1

Ans . The Punnett Square for the cross between GgWw and GGww is :-

GW Gw gW gw
Gw GGWw (yellow, round) GGww( yellow, wrinkled) GgWw (yellow, round) Ggww(yellow , wrinkled)

Genotypes are :- 1( GGWw) , 1(GGww) , 1 (GgWw) , 1 (Ggww)

phenotypes are :- 2 ( yellow , round ) and 2 ( yellow, wrinkled )

Phenotypic ratio :- 1 :1

Genotypic ratio :- 1:1:1:1

For a variety of reasons, the phenotypic ratios observed from real crosses rarely match the exact ratios expected based on a Punnett Square. There are many possible explanations for deviations from expected ratios. Sometimes, these deviations are due to sampling effects, in other words , the random selection of a non-representative subset of individuals for observation.

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