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Some traits would therefore be linked to the sex or gender of an individual. The manifestation of certain traits as an outcome of the expression of particular genes in the sex chromosome is referred to as sex linkage. For example, color blindness is a sex-linked trait whose allele is recessive and located on the x chromosome. hemophilia is a sex-linked trait caused by a gene mutation. The image shows the inheritance pattern of the hemophilia trait when the mother is a carrier and the father does not have the trait. Genes that are found on sex chromosomes are called sex-linked genes. These genes can be on either the x chromosome or the y chromosome. An example is the sex-linked recessive is horns in sheep that appear only in males. The recessive phenotypes of such genes are more common in males than in females. The examples of x-linked recessive trait in human are color blindness, duchenne muscular dystrophy, hemophilia. Sex-linked traits if a gene is found only on the x chromosome and not the y chromosome, it is said to be a sex-linked trait. Because the gene controlling the trait is located on the sex chromosome, sex linkage is linked to the gender of the individual. Com, a free online dictionary with pronunciation, synonyms and translation. Sex-linked traits students name institution affiliation sex-linked traits a sex-linked trait is defined as a trait whereby a gene is only attached to the x chromosome. Sex linkage is associated with the gender of a person since the gene controlling the sex-linked trait is attached to the sex chromosome (qvarnström & bailey, 2009). Insects also follow an xy sex-determination pattern and like humans, drosophila males have an xy chromosome pair and females are xx. Eye color in drosophila was one of the first x-linked traits to be identified, and thomas hunt morgan mapped this trait to the x chromosome in 1910. In fruit flies, the wild-type eye color is red (x w) and is dominant to white eye color (x w). Sex-linked traits are associated with genes found on sex chromosomes (x and y). As the female x-chromosome is larger, x-linked traits are more common than y-linked traits. An example of a sex-linked trait is red-green colorblindness, which is carried on the x-chromosome. Sex-influenced traits are autosomal traits that are expressed based on the influence of the sex, in particular the sex hormones e. Testosterone in males and estrogen and progesterone in females. Although these traits can be seen in both the sexes, the degree or frequency of the phenotypic expression varies according to the sex. example punnet square for sex-linked recessive trait if youre seeing this message, it means were having trouble loading external resources on our website.