This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Midterm 1.1Key 1 BIS101-001, Spring 2009 First Midterm Exam R. L. Rodriguez, Instructor April 20, 2009 Your exam has 6 questions with 15 parts on 8 pages (including score sheet). Please print your name on each page. 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.) Pp (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: Midterm 1.1 Key 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 g + 83 fat head + h 20 wild type + + 17 thick tongue and fat head g h 200 total Cross #2. Females heterozygous for ( h ) and ( e ) are crossed to males homozygous for ( h ) and ( e )....
View Full Document
This note was uploaded on 07/03/2009 for the course BIS BIS 101 taught by Professor Sanders during the Spring '09 term at UC Davis.
- Spring '09