In the land of Salad, there are two autosomal genes that (separately) determine
ID: 274192 • Letter: I
Question
In the land of Salad, there are two autosomal genes that (separately) determine two unique phenotypes: (i) Romaine lover (wild-type), Iceberg lover (recessive); (ii) Thousand Island dressing lover (wild-type), Balsamic Vinaigrette lover (recessive). We use the follow abbreviations for phenotypes: Ro = Romaine Lover; Ice = Iceberg Lover; TI = Thousand Island Lover; Ba = Balsamic Lover. Two true-breeding parents, one who is a Iceberg and Balsamic lover, and the other who is Romaine, Thousand Island lover, are mated. One of the F1 offspring is back-crossed to a Iceberg, Balsamic lover. If the recombination between the two genes is 0.20, what are the expected counts of each phenotype from 500 F2 offspring?
A. Ice/Ba Ro/TI Ice/TI Ro/Ba
200 200 50 50
B. Ice/Ba Ro/TI Ice/TI Ro/Ba
205 205 45 45
C. Ice/Ba Ro/TI Ice/TI Ro/Ba
225 225 25 25
D. Ice/Ba Ro/TI Ice/TI Ro/Ba
200 100 100 50
E. Ice/Ba Ro/TI Ice/TI Ro/Ba
125 125 125 125
Explanation / Answer
Answer:
A. Ice/Ba Ro/TI Ice/TI Ro/Ba (200 200 50 50) - Correct Option
Explanation:
Based on the given information:
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