Genetics and Genomics

Free Version

Upgrade subject to access all content


Sex-Linked Traits: X-Linked Recessive Traits


Sex linkage is expressed as the phenotype seen due to the inheritance of alleles on the sex chromosome of the individual.

X-linked recessive traits are expressed in all

individuals that possess the recessive allele, but are only expressed in those

individuals that carry the recessive allele on both chromosomes.