3 doctors weighed in:

What are dominant genetic conditions?

3 doctors weighed in
2 doctors agree

In brief: See below

With a dominant gene trait, the child only needs to receive one copy of the abnormal gene.
So, they have a 50% chance of getting the gene. With a recessive gene, the child needs 2 copies of the gene. So, they have a 25% chance of having both genes.

In brief: See below

With a dominant gene trait, the child only needs to receive one copy of the abnormal gene.
So, they have a 50% chance of getting the gene. With a recessive gene, the child needs 2 copies of the gene. So, they have a 25% chance of having both genes.
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1 comment
Dr. Richard Roberts
Dominant genes usually are very variable in whether and how they express themselves. When they have no symptoms while another individual may be severely affected.