Problem 2: Possible blood types of offspring.
Help to answer the question
What if the mother is type O+ and the father is A-? What would the offspring's blood type be? --Mark
Tutorial
InheritanceBoth the ABO blood type alleles and the Rh factor genetic information are inherited from our parents, but they are inherited separately.
Blood typesThe mother of the child is blood type 0. We know that she is homozygous. The father could be homozygous with two alleles of type A or he may be heterozygous with one allele of type A and one allele of type O. If the father is heterozygous, there is a 50% probability for a blood type A child and a 50% probability for a blood type O child. If the father is homozygous, every offspring will be blood type A.
Mother's Possible Genotype | Father's Possible Genotypes | Child's Possible Genotypes |
OO | AA | AO |
OO | AO | AO, OO |
The mother of the child is Rh+. She may be homozygous or she may be heterozygous with one Rh+ allele and one Rh- allele. If the mother is heterozygous, because the father is Rh-, there is a 50% probability for an Rh+ child and a 50% probability for an Rh- child. If the mother is homozygous, every offspring will be Rh+.
Mother's Possible Rh factor | Father's Possible Rh factor | Child's Possible Rh factor |
Rh+Rh+ | Rh-Rh- | Rh+Rh-, Rh+Rh- |
Rh+Rh- | Rh-Rh- | Rh+Rh-, Rh-Rh- |
The Biology Project
Department of Biochemistry and Molecular Biophysics
University of Arizona
Thursday, October 23, 1997
Contact the Development Team
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All contents copyright © 1997. All rights reserved
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