If both parents are Rh+, can their child be Rh-?

Question:

If both parents are Rh+, can their child be Rh-?

Rh factor:


The Rh factor is a protein that is located on the surface of red blood cells. There are two alleles for the Rh factor trait, Rh+ and Rh-. The inheritance pattern is identical to most characteristics that only have two alleles, with Rh+ securing dominance over Rh-.

Answer and Explanation:


The Rh+ allele is dominant to the Rh- allele.

If both parents are Rh+, but are both heterozygous Rh+ Rh-, then there remains a 25% chance that they will produce an Rh- offspring.

If both parents are heterozygous for the Rh trait, their child could be Rh-.


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Rh Blood Group, Rh Factor & Erythroblastosis Fetalis

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Chapter 13 / Lesson 6

The Rh blood group system is a classification system for blood based on the presence or absence of Rh antigen. Individuals who possess the Rh antigen are considered Rh positive, whereas individuals who do not carry the antigen are considered Rh negative. Learn about blood groups, the Rh blood group system, Rh negative blood, and the effect of Rh factor in erythroblastosis fetalis.


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