1. In cats, one gene controls the intensity of fur color. The different alleles of this gene produce phenotypes in which

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1 In Cats One Gene Controls The Intensity Of Fur Color The Different Alleles Of This Gene Produce Phenotypes In Which 1 (64.3 KiB) Viewed 56 times

1. In cats, one gene controls the intensity of fur color. The different alleles of this gene produce phenotypes in which the color is more intense (black cats) or (gray cats). The alleles for this color intensity gene are: BB- black, Bb-Black, and bb-gray. a. Based on these symbols, which is the dominant trait and which is the recessive trait? (5 points) b. Cross a heterozygous black cat with a homozygous gray cat. What are the phenotypes and genotypes for these crosses? (5 points) I 2. Hereditary deafness in dogs in caused by a recessive gene, "d." A kennel owner has a male dog that she wants to use for breeding purposes. The dog can hear so it is either DD or Dd, but the owner wants to make sure the deafness gene is not passed on. You are a geneticist and she comes to you for help. You create Punnet Squares to show the possible outcomes. a) Draw the Punnett squares to illustrate the outcome of a possible cross between a Dd male dog and a female dog who is Dd. What percentage of the offspring would be expected to be hearing and deaf? (5 points) b) Draw the Punnett squares to illustrate the outcome of a possible cross between a DD male dog and a female dog who is Dd. What percentage of the offspring would be expected to be hearing and deaf? (5 points) 3. The mutation for cataracts is represented as (c). Owls that are homozygous for the mutation (cc) exhibit cataracts. Owls that are homozygous for no cataracts are (CC) and owls that are carriers of the mutation but do not exhibit cataracts are (Ce). What percentage of the offspring in a cross between parents with the genotypes Ce and ee will exhibit cataracts? (5 points)