Is baldness inherited through the Y chromosome?
Disease description:
I've been experiencing severe hair loss lately. Since my father is bald, I'm worried about inheriting it. May I ask if baldness is inherited through the Y chromosome?
Doctor's answer (1)
Dr. Wang Xiaoyan
The inheritance pattern of baldness is quite complex and not solely determined by the Y chromosome. Baldness is a common genetic condition that may follow several inheritance patterns, including X-linked inheritance, autosomal dominant inheritance, and polygenic inheritance. X-linked inheritance means the baldness gene is located on the X chromosome. In this case, males, having only one X chromosome, have a 50% chance of inheriting and expressing the baldness trait if their mother carries the gene. Females, having two X chromosomes, may carry the baldness gene but might not exhibit the trait. Autosomal dominant inheritance indicates that the baldness gene is located on an autosome and is dominant; thus, if one parent carries the gene, each child has a 50% chance of inheriting and expressing the baldness trait. Recent research also suggests that baldness may result from the combined effects of multiple genes, each contributing to the expression of the trait. Therefore, baldness is not determined exclusively by the Y chromosome, but rather involves various inheritance patterns and the interaction of multiple genes.
