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YyRR is crossed with yyRR. The progeny w...

YyRR is crossed with yyRR. The progeny will be

A

1YyRR:1yyRR

B

3YyRR:1yyRR

C

1YyRR:3yyRR

D

YyRR only.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem of crossing the genotypes YyRR and yyRR, we can follow these steps: ### Step 1: Identify the Genotypes - Parent 1: YyRR (heterozygous for the first trait, homozygous dominant for the second trait) - Parent 2: yyRR (homozygous recessive for the first trait, homozygous dominant for the second trait) ### Step 2: Determine the Gametes - For Parent 1 (YyRR), the possible gametes are: - YR (from Yy and RR) - yR (from Yy and RR) - For Parent 2 (yyRR), the only possible gamete is: - yR (from yy and RR) ### Step 3: Create a Punnett Square Now, we can set up a Punnett square to visualize the combinations of gametes from both parents. | | yR | |---------|----------| | **YR** | YyRR | | **yR** | yyRR | ### Step 4: Analyze the Progeny From the Punnett square, we can see the possible offspring: - YyRR (from YR and yR) - yyRR (from yR and yR) ### Step 5: Determine the Phenotypic Ratio - YyRR: Yellow, Round seeds - yyRR: Green, Round seeds Thus, the progeny will consist of: - 50% Yellow, Round seeds (YyRR) - 50% Green, Round seeds (yyRR) ### Final Answer The progeny will be 50% YyRR (Yellow, Round) and 50% yyRR (Green, Round). ---
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