Passage III
The characteristics and genetics of D. pseudoobscura (a species of fruit fly) have been studied extensively. Table 1 shows the average egg production of different races and strains of female D. pseudoobscura at various temperatures throughout their lifetimes.
Table 2 shows the results of a study on testis length in male D. pseudoobscura with different combinations of Race A and Race B chromosomes. Male D. pseudoobscura have one X chromosome, one Y chromosome, two Number 2 chromosomes, two Number 3 chromosomes, and two Number 4 chromosomes.
14. A scientist wants to collect as many D pseudoobscura eggs as possible from 10 females. Based on the data presented in Table 1, the scientist should use 10 females from which of the following strains at which of the following temperatures?
Your Answer is
Correct Answer is J
Explanation
Looking at table 1, any strain has the highest egg production at 19°C, so exclude F & H;
At 19°C, Humboldt's egg production is higher than LaGrande's, So exclude G