In pea plants, green pods (G) are dominant to yellow pods (g) and tall plants (T) are dominant to short plants (t). A scientist crosses a GgTt pea plant with a ggtt pea plant and the following offspring are produced: Phenotype Number of Offspring Green, tall 723 Yellow, short 749 Green, short 48 Yellow, tall 46 What is the percent recombination frequency for this cross

Question

Biology

Sabrina Lin

12 May, 05:40

In pea plants, green pods (G) are dominant to yellow pods (g) and tall plants (T) are dominant to short plants (t). A scientist crosses a GgTt pea plant with a ggtt pea plant and the following offspring are produced: Phenotype Number of Offspring Green, tall 723 Yellow, short 749 Green, short 48 Yellow, tall 46 What is the percent recombination frequency for this cross

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Answers (1)

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Jordyn Foley · Answer 1

RF = 6.0025%

Explanation:

Given

Green pods (G) are dominant over yellow pods (g);

Tall plants (T) are dominant on short plant (t)

Parents are GgTt (Green tall) and ggtt (yellow short), so their cross is;

Progeny;

Green tall 723.

Yellow short 749,

Green short 48,

Yellow tall 46

Green tall and yellow short are parental type, so they are non-recombinants;

so, 723 + 749 = 1566 are non-recombinants;

Green short and yellow tall are recombinants,

so 48 + 46=94 are recombinants;

Recombination frequency (RF) = Total no. of recombinants progeny / total progeny * 100

Total progeny = 1566;

Total recombinants = 94

RF = 94:1566*100

= 6.0025%