Answer Happy

4. Trihybrid knowledge check: In a three gene system represented by the alleles A, B and C a person is heterozygous for all three genes, Show the gametes that this person could form. Probability: For the following questions, NO LARGE Punnett Squares are needed. Hitch-hikers thumb, the ability to bend the thumb backwards at the tip, is inherited as a dominant trait. Dimples are also a result of a dominant gene. Use H for the hitch-hikers gene and D for the dimple gene. 1. If a man and a woman are both heterozygous for both genes, what is the probability that they will produce a child with: a. Straight thumbs and no dimples? b. A female with hitch-hikers thumbs and no dimples? Blood Typing Possible Genotypes Suspect Blood Type 1 A 2 0 The police have rounded up the usual suspects in the latest rash of bookstore robberies. The thief got a nasty paper cut at the scene of the crime. The suspects are of blood types O, A, B and AB. The blood at the crime scene contained i alleles. Which suspect(s) therefore cannot have been involved? Explain by showing the possible genotypes of each suspect. 3 AB 4 B