YyRR is crossed with yyRR. The $F_{1}$ progeny will be ___.

1 YyRR : 1 yy RR

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3 Yy RR : 1 yy RR

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1 YyRR : 3 yy RR

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Yy RR only.

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Solution

The correct option is A
1 YyRR : 1 yy RR

The parent with genotype YyRR will produce two types of gametes , YR and yR. The second parent with genotype yyRR wil produce only one type of gamete with genotype yR. After fertilization two offsprings will be formed with the genotypes YyRR and yyRR respectively.

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YyRR is crossed with yyRR. The $F_{1}$ progeny will be ___.

F_{1}

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