Exam03-weinert - Name: page 2 1. Yeast Mating Pathways (25...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Name: page 2 1. Yeast Mating Pathways (25 points) A. Give one reason why it is easier to identify mutants in yeast than it is in human cells (5pt) B. Given in the table are mutants in mating pathway. Each mutant has only one mutation as indicated.Ste70* and ste80* are two mutants of the STE70+ and STE80+ genes, respectively. STE70+ and STE80+ are not linked. Genotype Phenotype 1. Ste+ mates normally 2. ste80* never mates 3. ste70* always mates 4. ste80* STE80+ 5. ste70* STE70+ 6. ste70* ste80* never mates i. Is ste80* recessive or dominant (circle one)? never mates mates normally ii. Is ste70* recessive or dominant (circle one)? iii. A ste80* ste70* diploid goes through STE80+ ste70* meiosis to generate haploid cells. What fraction of the haploids can be used to determine order of function of the STE70 and STE80 genes? 1/2 iv. Draw the pathway of gene function in mating of STE70+ and STE80+ genes. Yeast can be haploids which allows direct detection of recessive mutants.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Exam03-weinert - Name: page 2 1. Yeast Mating Pathways (25...

This preview shows document pages 1 - 2. Sign up to view the full document.

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