Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (D). The inability to taste PTC is caused by a recessive allele (r). What proportion of their children would be expected to not have the ability to taste PTC? (You may want to draw a punnett square on a scrap piece of paper).   Group of answer choices 25% 50% 75% 100% 0%

The gene for eye color has several alleles. The allele for brown eyes is symbolized with B and the allele for blue eyes is symbolized with b. A father has the phenotype of blue eyes (recessive trait) and a mother has a phenotype of brown eyes (dominant trait.). If they have a child, what is the most likely genotype?     Bb     bb     BB     none of these

An individual with blood type AB is certain they are adopted. Their claim would be supported if either of the parents had which blood type: AB, A, B, or O? Explain your answer. In your response, be sure to describe the degrees of dominance demonstrated by this trait (i.e., human ABO blood types). (2-4 sentences)

Chloe has a family history of colorblindness. Corry, her partner, is affected by colorblindness. Colorblindness is an X-linked recessive condition that has the alleles XB which means -unaffected and dominant- and Xb which means -affected and recessive-. Chloe’s mom was affected, but her dad was not. Her partner Corry is also affected. (a)What is the probability that if Chloe and Corry were to have a daughter that she would be affected? (b)Also, what are the chances that if they had a son that he would be affected? Answer (a) and (b) by creating a pedigree and punnet squares

Having a pointed hairline, or Widow’s Peak, is controlled by a dominant allele, while a curved or straight hairline is recessive. Determine the phenotypes for both you and your partner.  What genotypic and phenotypic ratios would you expect in your offspring?

In people, the trait for colorblindness (Xb) is a recessive sex linked trait and normal vision (XB) is dominant. If a female who is heterozygous for colorblindness has children with a man who has normal vision, what percent of their male children would be expected to be color blind? 0% 50% 100% 25%

Match the type of genetic dominance with the appropriate term: More than two type of alleles for a given trait Both alleles are expressed equally 1. Complete dominance 2. Incomplete dominance Phenotype of dominant homozygote and heterozygote are same 3. Codominance 4. Multiple Alleles Heterozygotes have intermediate (hybrid) between the two homozygotes

Parents often want to know what is genetically possible for their children. If two parents are carriers for a recessive lethal trait, what are the odds that their child is also a carrier? Many times there is interest in tracking multiple traits at once (not just 1 or 2). The same probability rules apply here, you just multiple all the odds together at once. Imagine two parents. They are both carriers for red hair, one person is blood type AB, the other is type O. They want to know the odds of a daughter with red hair and type B blood. Please do no not do a giant Punnett square! Use probability or individual squares. a. What are the genotypes of the parents? b. What are the odds of each trait (daughter, red hair, type B)

What is the phenotype ratio? I believe that the phenotype ratio is 1:1. Is the aristapedia allele dominant or recessive, and how can you tell?

A1) The allele for widows peak (H) is dominant for the allele for no widows peak (h). At a different gene locus, the allele for hitchhikers thumb (D) is dominant to the allele for non-hitchhikers thumb (d). A man is heterozygoous for the traits and marries a woman who has no widows peak and is heterozygous for hitchhikers thumb. What fraction of this couples children should have a widow's peak and a hitchhiker's thumb? 3/8 1/4 1/2 3/4 0 A2)The allele for widows peak (H) is dominant for the allele for no widows peak (h). At a different gene locus, the allele for hitchhikers thumb (D) is dominant to the allele for non-hitchhikers thumb (d). A man is heterozygoous for the traits and marries a woman who has no widows peak and has no hitchhikers thumb. What fraction of this couple's children should have no widow's peak and a hitchhiker's thumb? 3/8 0 1/4 1/2 1/8