What evidence did Alfred Sturtevant use to support his conclusion that Drosophila have four pairs of chromosomes?
A)All of the genes he identified had a recombination frequency of 50%.
B)Drosophila genes cluster into four distinct groups of linked genes.
C)The overall number of genes in Drosophila is a multiple of four.
D)All of the genes he identified had recombination frequencies of less than 50%.

Question

Quizplus · Accepted Answer

Alfred Sturtevant observed that genes in Drosophila clustered into four distinct groups of linked genes. This suggested that these groups were located on four separate chromosomes, leading him to conclude that Drosophila have four pairs of chromosomes. The other answer choices (A, C, and D) are not supported by Sturtevant's observations or conclusions.

What Evidence Did Alfred Sturtevant Use to Support His Conclusion