In pedigree analysis, it is easiest to identify the individual most likely to be the source of the mutation if the mutation is
A) mitochondrial.
B) recessive.
C) autosomal dominant.
D) sex-linked recessive.
E) pseudoautosomal.

Question

Quizplus · Accepted Answer

Autosomal dominant mutations can be traced through multiple generations and the affected individual will have at least one affected parent. This makes it easier to identify the source of the mutation in the pedigree analysis. Mitochondrial mutations can also be traced, but it is less clear who the source may be. Recessive and sex-linked recessive mutations may require additional testing and analysis to identify carriers and affected individuals. Pseudoautosomal mutations are located on the regions of the sex chromosomes that are shared between males and females, but they are rare and may not be relevant in most pedigree analyses.

In Pedigree Analysis, It Is Easiest to Identify the Individual