Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Sex-linked traits are characteristics determined by genes located on the sex chromosomes. They are often seen in males because they have only one X chromosome and therefore express all of the traits it carries, even if they are recessive.
Related terms
X-Linked Inheritance: This refers to the pattern of inheritance for genes located on the X chromosome.
Y-Linked Inheritance: This refers to the pattern of inheritance for genes located on the Y chromosome.
Hemizygous: The condition where there is only one allele present instead of two; this typically occurs in males for genes on the X-chromosome.