Activity: Genetics of ABO Blood Types
Type A will result from genetic combination____ or _____.
A+A or A+O
Type B will result from genetic combination____ or _____.
B+B or B+O
Possible outcomes are demonstrated at the right. A and B alleles are dominant over O. AO genotype will have an A phenotype. OO genotypes will have an O phenotype (inherited a recessive O allele from both parents). A and B alleles are codominant. A is inherited from parent 1 and B from parent 2. Results in AB phenotype.
Black - offspring genotype Red - offspring phenotype
Type O will ONLY result from genetic combination_____.
O+O
What determines a person's blood type?
Two genetic alleles (one from each parent) determine a person's blood type
Type AB will ONLY result from genetic combination____.
Type A + Type B
What parental genetics are needed to yield a child with OO (Type O) blood?
Type O + Type O
Could two parents have a child with Type O blood and a child with Type A blood?
Yes
Could two parents have a child with Type O blood and a child with Type AB blood?
Yes
In the above situation, is there more than one possibility for each parent's blood type?
Yes, if both parents pass down the recessive O
What is the phenotype?
a person's blood type- i.e. Type A
What is the genotype?
the alleles that a person was given by the two parents (need to know what the parent's blood types are to determine this)