1. Biology Review
Miss Luzma Fabre

2. Blood genotypes and phenotypes

3. 1. Two parents have the following alleles for
hemophilia: XHXh and XHY. Draw a Punnett
square to answer the following questions:
What is the probability that a son will have
hemophilia?
What is the probability that a daughter will have
hemophilia?

4. 2. In hemophilia, a sick allele is Xh and a normal
allele is XH.
a) What is the genotype of a woman that is a
carrier of hemophilia?
b) Of a normal woman?
c) Of a male that has hemophilia?

5. Pedigree

6. Construct a pedigree
3. Emily (carrier of colorblindness) and Dave
(normal) got married and had 2 children: Robert
(colorblind) and Monica (carrier).
• Monica got married with Tom (normal) and had 2
children: Vanessa (normal) and Paul (colorblind)
• Robert got married with Sophie (normal) and had
1 son: Nick
a) Construct a pedigree for the family
b) Determine if Nick has colorblindness