What disorder is sex linked?
What disorder is sex linked?
Examples of such disorders include Duchenne and Becker muscular dystrophy (both of which are neuromuscular disorders), fragile X syndrome (a type of mental retardation), and some types of leukodystrophy (a group of disorders that affect the central nervous system).
Who is more likely to have a sex linked genetic disorder?
Because females have two copies of the X chromosome and males have only one X chromosome, X-linked recessive diseases are more common among males than females.
Is baldness a sex linked trait?
So what do these sex chromosomes have to do with male pattern baldness? Well, many studies have shown that a crucial baldness gene is found on the X chromosome. This means that a man’s chance of being bald is linked to the genes on his X chromosome! Because of this, baldness is an example of an X-linked trait.
Why must males inherit colorblindness from their mothers?
Since it’s passed down on the X chromosome, red-green color blindness is more common in men. This is because: Males have only 1 X chromosome, from their mother. If that X chromosome has the gene for red-green color blindness (instead of a normal X chromosome), they will have red-green color blindness.
Is Down Syndrome sex linked?
The incidence of Down’s Syndrome increases with age of the mother, although 25% of the cases result from an extra chromosome from the father. Click here to view a drawing (from Bioweb) of a karyotype of Down’s syndrome. Sex-chromosome abnormalities may also be caused by nondisjunction of one or more sex chromosomes.
Does baldness skip a generation?
There is no scientific basis for the idea that baldness skip generations, regardless of any old wives tales you may have heard from the grapevine. However, there are many reasons why some people in families which carry the genetic trait for baldness do not go bald.
