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Question 1 2 pts The ABO blood group system of humans is an autosomal trait that has three alleles as follows. IA: protein A on red blood cells, IB: protein B on red blood cells, i: no protein on red blood cells. In this system, four different blood groups exist. They are groups A, B, AB and O. In a family of four children, each child has a different blood group with respect to this gene. The phenotypes of the parents must be 'what'? O A and B O B and AB AB and o O O and B

Question 2 2 pts A gene in Hereford cattle has the alleles H, having horns, and h, being hornless. Some farmers choose to humanely remove the horns as horns can be used to injure other cattle. Stanley, a hornless bull, was mated with Iris, a cow which had had her horns removed when she was young. The mother of Iris was homozygous recessive for the trait. All calves from a cross Iris x Stanley will be 'what'? O have a one-in-two chance of being homozygous dominant for horns O have a one-in-four chance of being hornless o be born with horns O carry at least one 'h' allele

Question 3 2 pts In a variety of garden peas, the allele for tall plants (T) is dominant over the allele for short plants (t). A cross between a tall plant and a short plant resulted in 50% of the offspring being short. What are the genotypes of the parents? O TT and tt O Tt and tt O TT and Tt O Tt and Tt