Sex linked diseases examples

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Genetically Inherited Human Disorders March 26, Sex linkage refers to when a gene controlling a characteristic is located on a sex chromosome X or Y. Some genetic conditions are caused by mutations in a single gene. Most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. Sex linked is a trait in which a gene is located on a sex chromosome.

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X-linked inheritance

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X-linked recessive inheritance is a mode of inheritance in which a mutation in a gene on the X chromosome causes the phenotype to be expressed in males who are necessarily hemizygous for the gene mutation because they have one X and one Y chromosome and in females who are homozygous for the gene mutation, see zygosity.

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This page has been archived and is no longer updated. The two gametes came together during fertilization to produce a diploid individual. NCBI Bookshelf. Sex linkage applies to genes that are located on the sex chromosomes. In humans, there are hundreds of genes located on the X chromosome that have no counterpart on the Y chromosome.

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