• Curly x Wildtype
“+” the wildtype (normal gene) and “Cy” the curly (mutant gene) 1. Given that Curly is a dominant trait, what percentage of these offspring should be expected to express the mutation (have curly wings)?
B. 50% of the offspring are expected to have the curly wing mutation.
2. What percentage will have the normal (wildtype) wings?
C. 50% of the offspring will have normal wildtype wings.
3. Organisms are called carriers of a gene if they do not express it themselves but they can pass it on to their offspring. Is it possible for a fly to be a carrier of the Curly gene?
B. No
• Ebony x Wildtype
“+” the wildtype (normal gene) and “e” the ebony (mutant gene) 1. Given that ebony is a recessive trait, what percentage of these …show more content…
Given that Curly is a dominant trait, what percentage of these offspring should be expected to express the mutation (have curly wings)?
C. 75% of the offspring are expected to express the curly wing mutation.
2. What percentage will have normal (wildtype) wings?
A. 25% of the offspring will have normal wildtype wings.
3. After counting your flies, you end up with about 214 curly and 98 wildtype. What could possibly explain this? (HINT: Think about what genotypes cause a fly to express a dominant gene)
In total there are 312 fruit flies. 214 of them express the curly wing mutation which is a 69% instead of the 75% expected. And 98 express the normal wildtype wing which is a 31% instead of the 25% expected. Since the percentages are different than expected the mutation could have either been too strong that the fruit flies with “Cy/Cy” that some could have died at an early stage. Or by chance more fruit flies inherited both recessive traits. It is an experiment with mutations, so odd things can happen when altering the genotype of the fruit flies.
• Ebony x Ebony
“+” The wildtype (normal gene) and “e” the ebony (mutant gene) 1. Given that ebony is a recessive trait, what percentage of these offspring should express the mutation (have an ebony colored