If a cross is made between two individuals, each having genotype Bb, two offsprings are obtained. Out of these first has dominant trait. What is the probability that the second offspring will exhibit recessive trait?

1/4

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3/4

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Solution

The correct option is A 1/4
The parent's genotype is "Bb".
Parent generation : Bb x Bb
Gametes :
Bb ---->
Bb
B
b
B BB Bb
b
Bb
bb
F $_{1}$ generation = 3 dominant : 1 recessive. Hence, the probability of a child to be recessive is 1/4. Option A is the correct answer.

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If a cross is made between two individuals, each having genotype Bb, two offsprings are obtained. Out of these first has dominant trait. What is the probability that the second offspring will exhibit recessive trait?

The correct option is A 1/4The parent's genotype is "Bb".Parent generation : Bb x BbGametes :Bb ---->BbBbBBBBbbBb bbF1 generation = 3 dominant : 1 recessive. Hence, the probability of a child to be recessive is 1/4. Option A is the correct answer.

The correct option is A 1/4
The parent's genotype is "Bb".
Parent generation : Bb x Bb
Gametes :
Bb ---->
Bb
B
b
B BB Bb
b
Bb
bb
F $_{1}$ generation = 3 dominant : 1 recessive. Hence, the probability of a child to be recessive is 1/4. Option A is the correct answer.