Question

Hemophilia is a condition in which blood does not clot normally. A family has

three male children with hemophilia and a female child who does not have
hemophilia. Which pattern of inheritance does this outcome display?
A. Sex-linked traits
B. Codominance
C. Polygenic inheritance
D. Incomplete dominance

Answer 1

A. Sex-linked traits

Step-by-step explanation:

Hemophilia is typically caused by a recessive allele on the X chromosome. Since males have only one X chromosome, they are more likely to express the trait if they inherit the hemophilia allele. In this family, three male children with hemophilia and a female child without hemophilia demonstrate the sex-linked inheritance pattern.