Problem set 4- answers

The parental gametes are:
	colorless, waxy, plump 		c wx Sh
	colored, nonwaxy, shrunken		C Wx sh

The double recombinant gametes are:
	colorless, waxy, shrunken		c wx sh
	colored, nonwaxy, plump		CWx Sh

The gene for endosperm size (Sh) is the gene in the middle, so
the order of the genes is either 
	C Sh Wx	or 	Wx Sh C

The distance between genes C and Sh is:
	84 + 99 +20 + 15 = 218/6708 = 0.032 x 100 = 
	3.2 map units

The distance between genes Sh and Wx is:
	974 + 951 + 20 + 15 = 1960/6708 = 0.292 x 100 = 
	29.2 map units

Interference is 1 - the Coefficient of Coincidence (C. of C.)

C. of C. is observed/expected double recombinants
.0.0052/0.0095 = 0.55

Interference = 0.45