quiz 6 - Biology 1510 Lab Quiz 6 Your Name_solution set T.A...

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Biology 1510 Lab Quiz 6 Your Name :_____ solution set ______________ T.A. Name :____________________________ Lab section, date, time :___________________ This quiz should take no more than 15 minutes. Clearly mark your answers on this sheet. Ambiguous and vague answers will not be counted as correct. 1) 2 points. In honeybees, a haplodiploidic social hierarchy exists. Each sex possesses a different number of copies of genes. The csd gene found in honeybees has been shown to determine the sex of the embryo based on copy number and similarity of alleles. Match the genetic designation in the left column with the fate of the larva in the right column by marking the correct letter designation in the left column. (Let’s say A and B are the alleles) Genetic Designation Fate of larva in colony ______ AB Female A. Will be killed by workers. ______ B Male B. Will develop into a fertile queen ______ BB Male C. Will develop into a normal worker bee ______ Knockout embryo (no copies csd ) ANSWER: Genetic Designation Fate of larva in colony ___ B___ AB Female A. Will be killed by workers. ___C___ B Male B. Will develop into a fertile queen ___A___ BB Male C. Will develop into a normal worker bee ___C__ Knockout embryo (no copies csd ) Note on Knockout embryo (see lab manual): A knockout embryo cannot develop into a fertile queen because a fertile queen cannot form unless there are two copies of the csd gene present. Further, it will not be killed off by the workers, as this only happens to diploid males. Knocking out the csd gene has no effect on male larva. On female larva, knockout creates a sterile male.
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This note was uploaded on 04/29/2008 for the course BIO 1510 taught by Professor Unknown during the Fall '07 term at Georgia Tech.

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quiz 6 - Biology 1510 Lab Quiz 6 Your Name_solution set T.A...

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