Females have two x chromosomes, so she will have two copies of each x-linked gene, giving her the opportunity to be either homozygous or heterozygous for each sex-linked gene. X-linked human Ò€¦ Sex linkage describes the sex-specific patterns of inheritance and expression when a gene is present on a sex chromosome (allosome) rather than a non-sex chromosome (autosome).

This inheritance pattern means that a male with the Ò€¦ When completing this pedigree with x-linked recessive inheritance, use the symbols x and y in the genotype to represent the sex chromosomes passed on from the previous generation. In humans, there are hundreds of genes located on the x chromosome that have no counterpart on the y chromosome. The traits governed by these genes thus show sex-linked inheritance.

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