In a scenario where the mother is Rh- and the father is Rh+, what are the odds that the fetus will be Rh+?

In a situation where the mother is Rh-negative and the father is Rh-positive, the likelihood of the fetus being Rh-positive is influenced by the genetics of the parents. Rh factor is inherited in a Mendelian fashion, where the Rh-positive trait is dominant over the Rh-negative trait.

The father’s Rh-positive status means he can either be homozygous (two Rh+ alleles) or heterozygous (one Rh+ allele and one Rh- allele). If we consider both scenarios:

1. If the father is homozygous (Rh+/Rh+), all offspring will inherit an Rh+ allele from him, resulting in 100% of the offspring being Rh+.

2. If the father is heterozygous (Rh+/Rh-), there is a 50% chance that an Rh+ allele will be inherited and a 50% chance that an Rh- allele will be inherited. In this case, there would be a 50% chance of being Rh+ and a 50% chance of being Rh-.

To determine the overall odds of the fetus being Rh+, one can combine both scenarios, but given the question, it's essential to recognize that when there’s an Rh+ father, there will always be a