Here's why:
* Sex chromosomes (X and Y) determine an individual's biological sex. Females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY).
* Genes located on these chromosomes are called sex-linked genes.
* Traits controlled by these genes are therefore called sex-linked traits.
Important things to remember about sex-linked traits:
* X-linked traits: These are more common than Y-linked traits because the X chromosome is larger and carries more genes. Examples include red-green colorblindness and hemophilia.
* Y-linked traits: These are less common because the Y chromosome is smaller and carries fewer genes. Examples include SRY gene (determines maleness).
* Inheritance patterns: Sex-linked traits often have different inheritance patterns in males and females due to the difference in sex chromosomes.
Let me know if you'd like more details on any of these points!
