Q1. Presume that a father and mother are both heterozygous for the allele for sickle cell anemia (Ss). The following Punnett square shows the inheritance of the sickle cell and SRY genes, with X representing the X chromosome with no SRY gene and Y representative the Y chromosome which does have an SRY gene. Complete the Punnett square.

Q2. The presence of freckles is due to a dominant allele. Four percent of the individuals in a particular population lack freckles. Utilize the Hardy-Weinberg formula to determine the percentage of individuals in this population who are homozygous dominant for freckles.