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.
12. According to Table 1, for the Seattle strain of D pseudoobscura from Race B, as the temperature increased from 9℃ to 25℃, average egg production:
Your Answer is
Correct Answer is H
Explanation
Look at the last two rows of table 1, as the temperature increases, the egg production first increases and then decreases