Question

co - dominance
human blood types are determined by genes that follow the codominance pattern of inheritance.
there are two dominant alleles (a and b) and one recessive allele (o).

1. write the genotype for each person based on the description;

a. homozygous for the \b\ allele
b. heterozygous for the \a\ allele
c. type o

1. pretend that brad pitt is homozygous for the type b allele, and angelina jolie is type \o.\

what are all the possible blood types of their baby?

Explanation:

Question 9

Part a

Step1: Recall homozygous definition

Homozygous means having two identical alleles. For the "B" allele, the genotype should have two B alleles.

Step2: Determine the genotype

So the genotype is \( BB \).

Step1: Recall heterozygous definition

Heterozygous means having two different alleles. For the "A" allele, one allele is A and the other is the recessive O (since A is dominant and we need a different allele, O is the recessive one here).

Step2: Determine the genotype

So the genotype is \( AO \).

Step1: Recall Type O blood genotype

Type O blood is recessive, so it must have two O alleles (homozygous recessive).

Step2: Determine the genotype

So the genotype is \( OO \).

Answer:

\( BB \)

Part b