the pedigree on the right shows the inheritance pattern for an x - linked recessive disorder. how many…
the pedigree on the right shows the inheritance pattern for an x - linked recessive disorder. how many individuals are carriers of the disease but are not affected?
Answer
Answer:
4
Explanation:
Step1: Understand X - linked recessive inheritance
In X - linked recessive disorders, females can be carriers (heterozygous, (X^AX^a)) and not affected, while males have only one X chromosome ((X^AY) - normal, (X^aY) - affected).
Step2: Analyze the pedigree
Looking at the pedigree, the half - shaded female symbols represent carriers (heterozygous for the X - linked recessive allele). Counting these half - shaded female symbols, we find there are 4 such individuals.