There are three possible genotypes and phenotypes for wing color in a species of moth: RR = red wings; Rr= orange wings; rr = yellow wings. A red winged moth is crossed with a yellow winged moth.
a) What is the pattern of inheritance in this example? Explain.
b) What are the genotypes and phenotypes of the parents?
c) What percent of the offspring will have red wings? Orange wings? Yellow wings?
There are three possible genotypes and phenotypes for wing color in a species of moth: RR = red wings; Rr= orange wings; rr = yellow wings. A red winged moth is crossed with a yellow winged moth.
a) What is the pattern of inheritance in this example? Explain.
b) What are the genotypes and phenotypes of the parents?
c) What percent of the offspring will have red wings? Orange wings? Yellow wings?
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While doing field work you discover a new dragonfly species that has either red (R) or clear (r) wings. Initial crosses indicate that R is dominant to r. You perform three crosses using three different sets of red-winged parents with unknown genotype and observe the following data:
| Cross | Phenotypes |
| 1 | 72 red-winged, 24 clear-winged |
| 2 | 4 red-winged |
| 3 | 96 red-winged |
a. What is the most likely genotype for each pair of parents?
b. Do you think there are a sufficient number of progeny to support each of your answers in the previous question?
Questions 9-15 are related. The drosophila alleles for purpleeyes (instead of red) and dumpy wings (instead of normal) are bothrecessive. Gene âEâ designates eye color (E: dominant, e:recessive), and gene âDâ designates wing shape (D: dominant, d:recessive). You cross a pure breeding purple eyed, normal wingedfly to a true breeding red eyed, dumpy winged fly.
9. What are the genotypes of the parental flies? (select allthat apply)
| EEDD |
| EEDd |
| EEdd |
| EeDD |
| EeDd |
| Eedd |
| eeDD |
| eeDd |
| eedd 10. What would you expect the offspring (F1) phenotypes tobe?
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