Question

Background for Discussion: Blood type is determined by the "alleles" that are inherited from the parents Alleles are possible types of a particular gene, in this case the blood type gene. There are four main blood types A, B, AB, or O; and three basic type alleles A, B, and O. Children have two alleles, one inherited from each parent. Blood types A and B are called co-dominant alleles, while type O represents the absence of a factor and is recessive to factors A and B. Thus, a person with type A blood may be either homozygous (AA) or heterozygous (AO). Similarly, a person with type B blood may be either homozygous (BB) or heterozygous (BO). Type AB occurs if a person is given an A factor by one parent and a B factor by the other parent. To have type O blood, an individual must be homozygous 0 (00) Thus, a person can express any one of the blood types, called phenotypes: A, B, AB, and O. However genetically analyzing, a person can possess any one of the six allele pairings, called genotypes: AA, AO, BB, BO, AB and oo Question(s): Create a hypothetical example of a couple preparing to have a child and compute the probability of the child getting a certain phenotype, given the known genotypes of the parents. Make sure you avoid computing a probability of 0 (as in if Dad is AO and Mom is OO, the probability of the child being B is 0) or a probability of 1 (as in if Dad is OO and Mom is OO, the probability of the child being O is 1 0 8 5

Answer 1

Dad is 'po' and Mon is'Bo dad and B Momo.25