This is not an entirely accurate statement, but it is generally true. It happens because sex-linked genes are located on the X chromosome only. Males have only one X chromosome (XY) and the corresponding Y chromosome from their fathers do not have genes for sex-linked traits, including color vision and proper blood clotting.
If a mother has normal color vision but carries a gene for color blindness on her other X chromosome, her genotype is Cc. If she has a daughter and that daughter inherits her mother's recessive gene, it is usually balanced by her father's X chromosome if he has normal color vision, and the daughter would be Cc like her mother.
However, although they are rare, a colorblind female is possible if her mother is a carrier (or is color blind, cc) and her father is colorblind also.
However, a son only inherits one X chromosome, so he is totally dependent on which X chromosome his mother gives him. His father's Y chromosome, which makes him male, does not have this gene on it. The son has a 50-50 chance of inheriting his mother's color blind gene, and if he does, he will be colorblind based on the gene inherited from his female parent. His male parent donated a Y chromosome, which has no genes for this trait on it, so the mother alone determines this trait in her sons.
Several genetic disorders are caused by genes on the X chromosomes.
Several genetic disorders are caused by genes on the X chromosomes.
females
Nope! The disease is equally in both males and females. This means that it is autosomal.
Males and females can be carriers, male carriers can only pass on to their daughters, they will be carriers as well have a premutation. Females can pass on to their sons or daughters, they will have the premutation or the full mutation.
Females have two X chromosomes, allowing them to be carriers of sex-linked genetic disorders on one X chromosome while having a normal allele on the other X chromosome. Males have only one X chromosome and one Y chromosome, so any genetic disorder on their single X chromosome will manifest as the disorder rather than being masked.
About 90% of eating disorders affect females.
Females
Females are considered to be carriers. This is because females have another X chromosome without the mutation that prevents them from getting this disease. If a woman is a carrier, she has a 50% risk to pass on her X chromosome with the mutation.
a sex-linked, or X-linked disorder
For eating disorders, 1 male with suffer for every 9 females. If there were 100 people with eating disorders, 10 would be men and 90 would be women.
Genetics and testosterone levels are correlated with male pattern baldness.