Which pattern on a pedigree would be exhibited in a dominantly inherited disease
ID: 148247 • Letter: W
Question
Which pattern on a pedigree would be exhibited in a dominantly inherited disease?
The disease in question is seen to skip generations.
About 50% of children from an affected parent have the disease.
Two people with the disease have a child that does not have the disease.
Two parents who do not have the disease have an afflicted child.
Answers B or C both apply.
The disease in question is seen to skip generations.
About 50% of children from an affected parent have the disease.
Two people with the disease have a child that does not have the disease.
Two parents who do not have the disease have an afflicted child.
Answers B or C both apply.
Explanation / Answer
Answer. About 50% of children from an affected parent have the disease.
The pedigree is dominant when:
The 2 contrasting forms of a gene are known as alleles. For example for a gene A, there are 2 alleles AA and aa, the former is homozygous dominant, the latter is homozygous recessive.
Aa will be Heterozygous dominant.
In pedigree the dominant genotype will be botj AA and Aa.