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Part A: Punnett Squares I. Monohybrid Crosses 1. In pea plants yellow peas (A) are dominant to...

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Biology

Part A: Punnett Squares

I. Monohybrid Crosses

1. In pea plants yellow peas (A) are dominant to green peas (a).Show a cross between two heterozygous yellow pea plants (Aa xAa).

A

a

A

a

What is the genotypic ratio of the offspring? _______ AA :_______ Aa: _________ aa

What is the phenotypic ratio of the offspring? _______ Yellow:________ Green

Part B: Using the Chi-square (χ2)analysis

9. In Parent 1 (P1) corn plants, the colorpurple is dominant to yellow, and round shape isdominant to wrinkled, which is why both Filial (F1) generation cornplants have the purple and round phenotypes, even when one of theparents (P1) is yellow and wrinkled.

The cross below (F1 x F1) produced the F2 generation corn thatyou are seeing in Figure 1. Determine thephenotypic ratios of the offspring of this cross: A crossbetween two F1 generation (heterozygous purple and heterozygousround) corn plants.

Phenotypic Ratio: _____: _____:_____:_____ (This is yourhypothesis: The corn in Figure 1 has thisratio.)

PR

Pr

pR

pr

PR

PPRR

PPRr

PpRR

PpRr

Pr

PPRr

PPrr

PpRr

Pprr

pR

PpRR

PpRr

ppRR

ppRr

pr

PpRr

Pprr

ppRr

pprr

Answer & Explanation Solved by verified expert
3.5 Ratings (475 Votes)
Ans1 Genotypic ratio of the offspring 1 2 1AA 1 Aa 2 aa 1Phenotypic ratio of the offspring 3 1Yellow 3 Green 1ExplanationGenotypic ration gives the ratio ofdifferent combinations of the two alleles in the offspring When agene    See Answer
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