X-LINKED DISORDERS:
Definition- are diseases that are caused by an error to the genes on the X chromosome and are passed down to children by inheriting a sex chromosome from each parent. Females are then labeled as XX and males are labeled as XY.
X-linked disorders are commonly passed down to males as they only inherit one X chromosome from their parents giving them a 50/50 chance to inherit the faulty genes. Females on the other hand inherit two X chromosomes in order for them to inherit the disease both parents would have to carry the error on their genes.
The picture above shows how an X-linked disorder may be passed on to offspring. In this case the mother carries the error on one of her X chromosomes but is not affected by the disorder and dad is not affected. They produce two individuals that are not affected at all, one female that will be a carrier just like the mother and one male who has the disorder. In the case of the male who has the disorder he received the X from the mother that has the error on it.
Definition- are diseases that are caused by an error to the genes on the X chromosome and are passed down to children by inheriting a sex chromosome from each parent. Females are then labeled as XX and males are labeled as XY.
X-linked disorders are commonly passed down to males as they only inherit one X chromosome from their parents giving them a 50/50 chance to inherit the faulty genes. Females on the other hand inherit two X chromosomes in order for them to inherit the disease both parents would have to carry the error on their genes.
The picture above shows how an X-linked disorder may be passed on to offspring. In this case the mother carries the error on one of her X chromosomes but is not affected by the disorder and dad is not affected. They produce two individuals that are not affected at all, one female that will be a carrier just like the mother and one male who has the disorder. In the case of the male who has the disorder he received the X from the mother that has the error on it.