Dictionary » S » Sex-linked trait

Sex-linked trait


noun, plural: sex-linked traits

A trait genetically determined by an allele located on the sex chromosome


Since traits are sex-linked, there is usually a distinct pattern. For example, color blindness is a sex-linked trait whose allele is recessive and located on the X chromosome.

When the mother is color blind and the father is not:

  • all sons are going to be color blind
  • daughters are normal but carriers of the gene

When the father is color blind and the mother is not:

  • all sons are normal
  • all daughters are normal but carriers

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