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If the genotype of a hybrid F₁ is RrYy, what is the probability of formation of a gamete Ry given both genes are located on two different chromosomes.

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1/4

1/6

1/8

1/2

answer is B.

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Detailed Solution

The probability of formation of gamete Ry from the plant having genotype RrYy, when both the genes are located on different chromosomes, there is equal chance of inheritance of all genes.

Rr can form gametes R and r. So, the probability of R allele in a gamete is 1/2

Yy can form gametes Y and y. So, the probability of y allele in a gamete is 1/2.

By multiplying the individual frequencies, the probability for gamete with gene combination Ry = 1/2 x 1/2 = 1/4

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