Practice_Problem_Set1_2012

Practice_Problem_Set1_2012 - 1 BIS101-001, Winter 2012:...

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1 BIS101-001, Winter 2012: Practices Problems R. L. Rodriguez, Instructor (The following questions are typical of those on the course midterm exams.) 1. The domestic mink have several coat colors. One color is blue-gray called "platinum" ( p ). The standard or wild type coat color in mink is black-brown or agouti ( P ). When a wild type mink was crossed with a gray-colored mink, all offspring are black-brown. (1A) Using the alleles ( P ) and ( p ), indicate the genotype of the F1? (2 pts.) (1B) Interbreeding the F 1 mink produce 80 F 2 mink. 60 of the F 2 were agouti and 20 were platinum. Indicate the genotypes in the F 2 black-brown mink. Circle the correct answer (6 pts.) (i) PP and Pp (ii) PP and pp (iii) Pp (iv) pp (v) PP (1C) How many of the 80 mink in the F2 are expected to heterozygous? Circle the correct answer (6 pts.) (i) 10 (ii) 20 (iii) 30 (iv) 40 (v) 60 2. Three mutant genes have been identified in Drosophila: Thick tongue ( g ), evil eye ( e ), and fat head ( h ). All are autosomal genes recessive to wild-type alleles. Two geneticists make a bet on who can construct a genetic map of these genes, first. One geneticist performs two 2-factor crosses, with results as follows:
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2 Cross #1. Females heterozygous for ( g ) and ( h ) are crossed to males homozygous for ( g ) and ( h ). The following progeny were produced: 80 thick tongue 83 fat head 20 wild type
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This note was uploaded on 03/18/2012 for the course BIS 101 taught by Professor Simonchan during the Winter '08 term at UC Davis.

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Practice_Problem_Set1_2012 - 1 BIS101-001, Winter 2012:...

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