Sex-linked
Sex-linked
Sex-linked (pronunciation: /sɛks lɪŋkt/) is a term used in genetics to describe genes, or traits that are carried on the sex chromosomes, typically the X or Y chromosome.
Etymology
The term "sex-linked" is derived from the words "sex", referring to the biological and physiological characteristics that define men and women, and "linked", which refers to the connection or relationship between two or more things. In this context, it refers to the connection between certain traits or diseases and the sex chromosomes.
Definition
A Sex-linked trait is a characteristic, such as red-green color blindness or hemophilia, that is determined by genes located on the sex chromosomes. In humans, these traits are usually linked to the X chromosome, as it is larger and carries more genes than the Y chromosome.
Related Terms
- X-linked: Refers to genes located on the X chromosome. X-linked traits can be either dominant or recessive, but they are more commonly seen in males, as males have only one X chromosome.
- Y-linked: Refers to genes located on the Y chromosome. Y-linked traits are always expressed in males, as only males have a Y chromosome.
- Sex-linked inheritance: This is the pattern of inheritance for sex-linked traits. It differs from autosomal inheritance, as the probability of inheriting a sex-linked trait depends on the sex of the individual.
- Sex-linked disorder: A disorder that is caused by a mutation in a gene on the sex chromosomes. Examples include hemophilia and Duchenne muscular dystrophy.
External links
- Medical encyclopedia article on Sex-linked
- Wikipedia's article - Sex-linked
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