what will be the possible genotype and phenotype of blood of a child whose father is o positive and rather is A positive show though a cross
Answers
The child's genotypes may be AA (25), AO (50), and OO (25%) assuming the mother is homozygous dominant for the ABO blood group (AA) and the father is heterozygous for the ABO blood group (AO).
The father is Rh positive thus there is a possibility that he is either homozygous (++) for the Rh factor or heterozygous (+-) for the Rh factor. Heterozygous individuals have a 50% chance of passing the Rh positive allele to their progeny.
Therefore the possible blood types and Rh factor of the child are:
- A positive (50%)
- A negative (25%)
- O positive (25%)
The expression of the inherited alleles will determine the phenotype of the child. the following are potential phenotypes for the child:
- A positive blood type (50%)
- A negative blood type (25%)
- O positive blood type (25%)
Note that only the likelihood of inheritance can be used to forecast the child's blood type and Rh factor. Blood typing tests are the only way to identify a child's true blood type and Rh factor.