probset05 - Problem Set 05, 2010 Name: 8 points total Note:...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Problem Set 05, 2010 Name:                 8 points total Note: Please show your work. Define your symbols and don't assume linkage unless otherwise stated. 1.  While observing a new species of butterfly, you notice that two true-breeding strains exist.  One strain is  yellow and purple, and the other strain is just purple.  You decide to perform some genetic crosses and cross  a yellow and purple butterfly with a purple butterfly.  All the F1s are purple.  When you cross two F1  individuals, you find: 240 purple                                                 62 purple and yellow                                                 19 yellow                                                  a) Give the genotypes for the F2s and the original parental strains.   b) What ratio of F2s is observed?  c) What is the likelihood that purple individuals will be homozygous for all genes involved?  2.  In a new strain of dog, you find two new recessive mutations.  One mutation results in the animal having a  short tail (st), and the other mutation causes the dog to be spotted instead of a solid color (po).  After more  study, you discover that the two genes for the traits are 22 mu apart.  If you mate individuals heterozygous for  both traits (st + / + po), what percentage of their offspring will be both short-tailed and spotted, assuming no  double crossovers?   1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Problem Set 05, 2010
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/01/2011 for the course L 311 taught by Professor Forrester during the Fall '10 term at Indiana State University .

Page1 / 6

probset05 - Problem Set 05, 2010 Name: 8 points total Note:...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online