Shaded individuals in this pedigree have an X-linked genetic disorder that causes green toenails. Individuals who are not shaded have the normal clear toenails. Please answer the following questions regarding this pedigree. Assume that a capital "G" represents the dominant allele and that a lower case "g" represents the recessive allele.
1. Which allele is dominant?
2. The pedigree identity numbers of the identical twins are
3. The genotype of individual I-4 is
4. The genotype of individual II-6 is
5. What is the probability that the next child from the marriage of II-2 x II-3 will have be a son with green toenails?
6. Supposed individuals III-1 and III-5 marry and have children. What is the probability that their first child will be a daughter with green toenails?