Genetic Causes
The genes for albinism are located on “autosomal” chromosomes. Those without albinism have two copies of these chromosomes and the genes on. People with albinism do not have functioning gene copies. Since alibinism is recessive, you can still carry the trait, but also make pigment in the skin.
Ocular albinism (OA1) is caused by a genetic defect of the genes that are important to pigmentation in the eye. OA1 is on the X chromosome. So, for a male to have OA1, a male only needs to inherit one defective copy of the gene for ocular albinism from his mother. Therefore almost all of the people with OA1 are males.
Overall, no matter what the type of albinism, they are all in common inj that the cause for the changes in pigment are a result of defected genes that are passed down from ancestors..
Ocular albinism (OA1) is caused by a genetic defect of the genes that are important to pigmentation in the eye. OA1 is on the X chromosome. So, for a male to have OA1, a male only needs to inherit one defective copy of the gene for ocular albinism from his mother. Therefore almost all of the people with OA1 are males.
Overall, no matter what the type of albinism, they are all in common inj that the cause for the changes in pigment are a result of defected genes that are passed down from ancestors..
So, What are the Chances?
Both parents must carry the albinism gene to have a child with albinism.
When both parents, who do not have albinism, carry the gene there is a 25% chance that the baby will be born with albinism.
When one of the parents has albinism, and the other is a carrier, the chances of having a child with albinism is 50%.
When one of the parents has albinism, and the other does not (and is also not a carrier), the chances of having a child with albinism is 0%.