In the mouse, gene A allows pigmentation to be deposited in the individual coat hairs; its allele a prevents such deposition of pigment, resulting in an albino. Gene B gives agouti (wild-type fur); its allele b gives black fur
(a) Diagram the cross between a doubly heterozygous agouti mouse mated with a doubly homozygous recessive white mouse.
(b) What would be the expected phenotypic ratio in the progeny?
(a) AaBb × aabb
(b) 1 (agouti):1 (black):2 (albino)
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What is the first step in the process of transferring the blight-resistant gene from one organism
to another?
a. Identify the gene that you need. b. Insert the gene into a plasmid. c. Transcribe and translate the gene. d. Decode the DNA.
Which of the statements below is true about
warfarin? a. It is a very effective rodenticide. b. It interferes with blood clotting in rats. c. Rats that are resistant to warfarin possess a gene that is rare among vulnerable rats. d. It is an agent of natural selection in rats. e. All of these are true.
Which of the following are considered more
primitive based upon the structure of their limbs? a. bats b. reptiles c. porpoises d. penguins e. birds
Which statement BEST describes the role and importance of mobile genetic elements in genomes?
A) Mobile genetic elements almost always have either neutral or deleterious consequences for their host. B) Mobile genetic elements are largely beneficial to hosts because they introduce new phenotypic variation into a population via transposition and/or duplication of important genes. C) Mobile genetic elements can have deleterious, neutral, OR beneficial consequences for the host organism, and all three kinds of outcomes are common. D) Mobile genetic elements are especially important for plant genomes such as the tomato, but they are not present in most animal genomes.