When two carriers have a child, there is a: An individual with a recessive gene mutation is known as a carrier. In autosomal recessive inheritance, it takes two copies of the mutant gene to give rise to the disorder. RP can be inherited in one of three ways: The 22 other paired chromosomes, called autosomes, contain the vast majority of genes that determine non-sex traits. The X and Y chromosomes, known as sex chromosomes, determine whether a person is born female (XX) or male (XY). One copy of each chromosome is passed by a parent at conception through egg and sperm cells. Each cell in your body contains 23 pairs of chromosomes. Genes are bundled together on structures called chromosomes. To understand how RP is inherited, it's important to know a little more about genes and how they are passed from parent to child.
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