Answer:
Step-by-step explanation:
To determine Tim's genotype and the genotypes of his parents, we need to understand the inheritance pattern of colorblindness. Colorblindness is a sex-linked recessive trait, which means it is located on the X chromosome. Males have one X chromosome and one Y chromosome, while females have two X chromosomes.
Given that Tim is colorblind, we can conclude that he inherited the colorblindness allele from his mother, as the mother is the carrier in this scenario. The father does not have a colorblindness allele since he does not exhibit colorblindness.
Based on this information, we can determine the following genotypes:
Tim's genotype: XcY, where "Xc" represents the colorblind allele and "Y" represents the non-colorblind allele.
Tim's father's genotype: XY, as he does not carry the colorblind allele.
Tim's mother's genotype: XcX, as she carries one colorblind allele (Xc) and one non-colorblind allele (X).
Please note that this assumes that colorblindness is the only relevant genetic factor in this scenario and that there are no other complicating factors or variations in the inheritance pattern.