Question

What is the inheritance pattern for a gene that is located on a sex chromosome but appears to be inherited like an autosomal gene?

1) Autosomal recessive
2) Autosomal dominant
3) X-linked recessive
4) X-linked dominant

Answer 1

The inheritance pattern for a gene located on a sex chromosome that appears to be inherited like an autosomal gene is likely X-linked dominant, as it affects both males and females and does not skip generations. The correct optionis 4).

Step-by-step explanation:

The inheritance pattern for a gene that is located on a sex chromosome but appears to be inherited like an autosomal gene could be either X-linked recessive or X-linked dominant, depending on how the trait is expressed in individuals. If the trait seems to follow an autosomal pattern (affecting both sexes equally and not skipping generations), but it is located on the X chromosome, it is likely an X-linked dominant inheritance pattern. In this scenario, a single copy of the gene on one of the X chromosomes is sufficient to express the trait. Females (XX) can be affected if only one X chromosome has the mutation, and males (XY) will be affected if their single X chromosome carries the gene. X-linked dominant traits do not skip generations often because an affected parent is likely to pass on the trait to their offspring.