(Solved): 2. "Dumpy" is a commonly used mutant phenotype in the nematode worm \( C \). elegans. You cross an ...

2. "Dumpy" is a commonly used mutant phenotype in the nematode worm \( C \). elegans. You cross an worm with the dumpy phenotype with a wildtype individual. All the offspring (F1 generation) have the wildtype phenotype. a) (1 point) Assign a gene symbol for the "Dumpy" and wild-type alleles, indicating which one is dominant. b) (1 point) Write out the genotypes of the worms in the above cross in the table below, using correct genetic notation. Dumpy parent Wildtype parent c) ( 2 points) You cross individuals from the \( \mathrm{F} 1 \) generation to make an F2 generation. Draw a Punnet square to show this cross. What proportion of offspring do you expect to have a wildtype phenotype, and what proportion do you expect to have a dumpy phenotype? d) (1 point) If you backcrossed the \( \mathrm{F} 1 \) individuals with a truebreeding recessive strain of \( C \). elegans, what proportion of the offspring will have the dumpy phenotype and what proportion will have the wildtype phenotype?