Question

23. In the following pedigree chart, the mutant trait is shaded black. The gene responsible for the
trait is

(1) Dominant and X-linked
(2) Dominant and autosomal or dominant and X-linked
(3) Recessive and X-linked
(4) Recessive and Y-linked​

Answer 1

Answer:

Sex-linked dominant

Sex-linked dominant is a rare way that a trait or disorder can be passed down through families. One abnormal gene on the X chromosome can cause a sex-linked dominant disease.

Related terms and topics include:

Autosomal dominant

Autosomal recessive

Chromosome

Gene

Heredity and disease

Inheritance

Sex-linked recessive