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?
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.
the mouse would feed from the plant, the snake will then eat the mouse, and the bird will eat the snake (usually if they are big birds not like the one from the picture)
