Morgan's student Sturtevant demonstrated that the recombination frequencies between a series of linked genes is additive.Examine the following recombination data from Sturtevant,and determine the proper order of the genes on the Drosophila X chromosome.Assume y is in the 0.0 position.

A)y m v w
B)y w v m
C)y m w v
D)y w m v

Question

Morgan's student Sturtevant demonstrated that the recombination frequencies between a series of linked genes is additive.Examine the following recombination data from Sturtevant,and determine the proper order of the genes on the Drosophila X chromosome.Assume y is in the 0.0 position.

A)y m v w 
B)y w v m 
C)y m w v 
D)y w m v

Quizplus · Accepted Answer

Since y is the starting position (0.0), we can determine the order of the genes by adding up the recombination frequencies between each pair of genes. Using the data from Sturtevant, we get:

- y - m = 17%
- m - v = 10%
- v - w = 23%

If we add up these recombination frequencies, we get:

- y - m - v - w = 50%

Therefore, the correct gene order is y-w-v-m. The only option that matches this order is B.

Morgan's Student Sturtevant Demonstrated That the Recombination Frequencies Between a Series