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Dvinal [7]
3 years ago
10

If Patricia and Les have another child, what is the probability that they will have a daughter that is affected with galactosemi

a? Express your answer as a fraction (example 3/5).

Biology
1 answer:
Ivahew [28]3 years ago
3 0

The questions lacks the pedigree chart. The chart has been attached below.

Answer:

1/8.

Explanation:

The trait follows the autosomal recessive inheritance because the trait is seen only in the homozygous recessive condition only.

Patricia and Les has both the genotype Gg as clear from the pedigree chart. The cross between the patricia and les will give the genotype GG, Gg , Gg, gg. The probability of the affected child is 1/4 and the probability of a girl is 1/2.

The girl with affected galactosemia 1/4 × 1/2 = 1/8.

Thus, the answer is 1/8.

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