NEET BIOLOGY

Detailed explanation-1: -And in humans this is the X or the Y chromosomes. And so some of the more familiar sex-linked traits are hemophilia, red-green color blindness, congenital night blindness, some high blood pressure genes, Duchenne muscular dystrophy, and also Fragile X syndrome.

Detailed explanation-2: -The X chromosome has about 900 genes while the Y chromosome has about 55. The Y chromosome contains a ‘male-determining gene’ called the SRY gene. This gene is what triggers testes to form in the embryo, if there is a mutation in this gene the embryo will develop female genitalia despite having XY chromosomes.

Detailed explanation-3: -A sex-linked inherited disorder is caused by a genetic mutation on the X chromosome. These are also inherited in a dominant or recessive pattern. There are also disorders associated with the Y chromosome, but these are inherited less frequently.

Detailed explanation-4: -A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons (no male-to-male transmission). A condition is considered Y-linked if the altered gene that causes the disorder is located on the Y chromosome, one of the two sex chromosomes in each of a male’s cells.