Freckles is determined by a single gene and having freckles is dominant over not having freckles. If a man with freckles and a woman without freckles have a child that does not have freckles then

Hemophilia is an X-linked disorder that affects the body’s ability to create blood clots. The allele for normal blood clotting, XH, is dominant over the allele for hemophilia, Xh. An unaffected daughter from the above cross married a man who does not have hemophilia. Determine the probability of their offspring being A daughter with hemophilia A daughter without hemophilia A son with hemophilia A son without hemophilia Express your answer as a phenotypic ratio. Number: Answer Answer Answer Answer Phenotype: Affected female Unaffected female Affected male Unaffected male

A couple can both see red (a sex-linked trait). The allele responsible for red color-blindness is recessive on the X-chromosome. The woman is a carrier for this condition. What are the likely genotypes of this couple? What is the probability of the couple having a daughter who is red colorblind

Hemophilia is an X-linked recessive disorder that results in an individual not having a functional gene for a clotting factor and therefore unable to clot blood. A couple has 4 boys. One of the boys has just been diagnosed with hemophilia. What is the probability that all of the other 3 boys will also have hemophilia?

People with polydactyly have more than five fingers or toes on their hands or feet. Polydactyly results from an autosomal dominant genetic disorder. Draw a pedigree for a family with polydactyly, using the following information:  Zack has polydactyly but his wife, Zoe does not.  Zack and Zoe’s daughter Yolanda has polydactyly but their son Yogi does not.  Yolanda has two children with her husband, Xavier, who does not have polydactyly:  Wilma, who is normal and Wade, who has polydactyly.  Use your pedigree to determine what is Zoe's genotype. A) DD B)dd C)Dd