Despite its length, this structure is listed second-to-last in the Denver system, and in mammals it is prone to lyonization.
Despite its length, this structure is listed second-to-last in the Denver system, and in mammals it is prone to lyonization. A common form of mental retardation is caused by the fragile syndrome of this structure, and T. H. Morgan discovered that the gene for white eyes in fruit flies is carried on this chromosome. Unlike other trisomies, possessing three of this structure can still result in a normal phenotype, while tortoiseshell cats are produced when one of these structures condenses into a Barr body. Responsible for the inheritance of sex-linked disorders such as hemo- philia and colorblindness, name this chromosome, two of which appear in the genotype of a normal human female.
Despite its length, this structure is listed second-to-last in the Denver system, and in mammals it is prone to lyonization.
{X} chromosomes [prompt on {sex chromosomes}; do not accept or prompt on “Barr body”]