QuestionJune 5, 2025

By knowing the traits of the parents, it is often possible to predict the physical appearance of their offspring. Below is information about two parents: B=brown eyes (dominant trait) b=blue eyes (recessive trait) Two hybrid parents (Bb)have a child. What is the probability that their child will have blue eyes? 25% 50% 75% 100%

By knowing the traits of the parents, it is often possible to predict the physical appearance of their offspring. Below is information about two parents: B=brown eyes (dominant trait) b=blue eyes (recessive trait) Two hybrid parents (Bb)have a child. What is the probability that their child will have blue eyes? 25% 50% 75% 100%
By knowing the traits of the parents, it is often possible to predict the physical appearance of their offspring.
Below is information about two parents:
B=brown eyes (dominant trait)
b=blue eyes (recessive trait)
Two hybrid parents (Bb)have a child. What is the probability that their child will have blue eyes?
25% 
50% 
75% 
100%

Solution
4.0(248 votes)

Answer

25% Explanation 1. Determine Genotypes of Parents Both parents are hybrid (Bb), meaning they have one dominant allele (B) and one recessive allele (b). 2. Set Up Punnett Square Create a Punnett square with each parent's alleles: B and b. 3. Calculate Probability of Blue Eyes The combinations are BB, Bb, bB, and bb. Only bb results in blue eyes. 4. Determine Probability There is 1 bb out of 4 possible combinations, so the probability is \frac{1}{4} or **25%**.

Explanation

1. Determine Genotypes of Parents<br /> Both parents are hybrid (Bb), meaning they have one dominant allele (B) and one recessive allele (b).<br /><br />2. Set Up Punnett Square<br /> Create a Punnett square with each parent's alleles: B and b.<br /><br />3. Calculate Probability of Blue Eyes<br /> The combinations are BB, Bb, bB, and bb. Only bb results in blue eyes.<br /><br />4. Determine Probability<br /> There is 1 bb out of 4 possible combinations, so the probability is $\frac{1}{4}$ or **25%**.
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