In pedigree analysis, finding the source of mutation (the first person in whom t
ID: 259188 • Letter: I
Question
In pedigree analysis, finding the source of mutation (the first person in whom the mutation occurred) is impossible in which of the following modes of inheritance?
Autosomal dominant with complete penetrance
XLR traits
Autosomal dominant with variable expressivity
AR traits
Y-linked traits
Full phenotypic expression of both members of a gene pair in the heterozygous state is called complete dominance.
True
False
A.Autosomal dominant with complete penetrance
B.XLR traits
C.Autosomal dominant with variable expressivity
D.AR traits
E.Y-linked traits
Explanation / Answer
1. Autosomal dominant with variable expressivity.
In this case, every mutation has different even though it has same genotype which was impossible to predict how this mutation occured.
2. False.
Complete dominance is the complete masking of a dominant allele over the recessive allele.