The Rh factor is a protein found on the surface of red blood cells. The Rh factor must be matched during blood transfusions. Rh+
individuals may receive blood from Rh+ and Rh- donors while Rh- individuals can only receive Rh- blood. Rh+ individuals possess at least one dominant allele (R) for the trait while Rh- individuals are homozygous recessive. Two Rh+ parents have children. What is the probability that any offspring will NOT be able to receive a transfusion from either parent?
2 answers:
Answer:
The correct answer would be 25 percent.
It is the case when both the parents are heterozygous for the trait that is, both are Rr in genotype.
Thus, both the parents would produce two types of gametes one of which contain R and the other one would contain r.
The cross would result in the production of the offspring with three types of genotypes; RR, Rr, and rr.
The three genotypes would be present in the ration 1 (RR): 2 (Rr): 1 (rr).
Thus, only one out of four would be Rh- in phenotype. Hence, only 25 percent is the probability that the offspring would not be able to receive blood from either parent.
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