Some problems represent a non–X-linked trait that is recessive. Inheritance of Single-Gene Problems

Some problems represent a non–X-linked trait that is recessive. Inheritance of Single-Gene Problems

To really have the condition, an individual often must get two irregular genes, one from each parent. Neither parent has the disorder but each has a 50% chance of passing the abnormal gene to the children if both parents carry one abnormal gene and one normal gene. Consequently, each youngster has

A 25% possibility of inheriting two genes that are abnormaland therefore of developing the condition)

A 25% potential for inheriting two genes that are normal

A 50% potential for inheriting one normal and another abnormal gene (therefore becoming a provider associated with condition such as the parents)

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