MIT Biology Department 7.012: Introductory Biology -Fall 2004 Instructors: Professor Eric Lander, Professor Robert A. Weinberg Dr Claudette Gardel Name Section 7.012 Problem set 3 Please print out this problem set and record your answers on the printed copy. Answers to this problem set are to be turned in at the box outside by 4: 10 Wednesday, October I Problem sets will not be accepted late Solutions will be posted on the web October 2, 2003. Question 1 You have two pure-breeding colony of mice. Colony I mice have black fur and long tails, Colony II mice have golden fur and short tails You cross mice from each of these colonies Fo black fur and golden fur and short tails F1 Brown fur and long tails a) Predict genotypes for the mice shown in the cross above. Define your notation. i) black fur and long tails ii) golden fur and short tails i) Brown fur and long tails: b) You mate a male and a female from the Fi generation. Given your prediction in(a), what genotypes and phenotypes do you see in the F2 generation, and in what ratios? 7012Fall2003Name:___________________________________ Section:_____ 7.012 Fall 2003 7.012 Problem Set 3 Question 1 You have two pure-breeding colony of mice. Colony I mice have black fur and long tails, Colony II mice have golden fur and short tails. You cross mice from each of these colonies. F0 black fur and long tails X golden fur and short tails ⇓ F1 Brown fur and long tails a) Predict genotypes for the mice shown in the cross above. Define your notation. i) black fur and long tails: ii) golden fur and short tails: iii) Brown fur and long tails: b) You mate a male and a female from the F1 generation. Given your prediction in (a), what genotypes and phenotypes do you see in the F2 generation, and in what ratios? Please print out this problem set and record your answers on the printed copy. Answers to this problem set are to be turned in at the box outside by 4:10 Wednesday, October 1. Problem sets will not be accepted late. Solutions will be posted on the web October 2, 2003. MIT Biology Department 7.012: Introductory Biology - Fall 2004 Instructors: Professor Eric Lander, Professor Robert A. Weinberg, Dr. Claudette Gardel