1. a man and woman are both affected with the brca1 gene for familial breast cancer, a disease that has 80% penetrance in all in

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1. a man and woman are both affected with the brca1 gene for familial breast cancer, a disease that has 80% penetrance in all in

dividuals who carry the allele. they are both heterozygotes for the disease-causing mutation. what is the probability that they will have a phenotypically normal child?

Biology

1 answer:

allochka39001 [22] · Answer 1 · 2023-09-08T03:34:10+03:00

The probability to have a phenotypically normal child will be 40% because parents are both heterozygotes for this disease-causing mutation that has 80% penetrance.

<h3>What is genetic penetrance?</h3>

The expression genetic penetrance refers to the chances of expressing a given phenotype which may be associated with both genetic and environmental factors.

In conclusion, The probability to have a phenotypically normal child will be 40% because parents are both heterozygotes for this disease-causing mutation that has 80% penetrance.

Learn more about genetic penetrance here:

brainly.com/question/5662654

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