The Two Loci Y (Y)and R (R)are Normally 20 Map

Multiple Choice

The two loci Y (y) and R (r) are normally 20 map units apart.A particular dihybrid individual is heterozygous for an inversion that spans 98% of the region between Y and R,but does not include Y or R.If this dihybrid is testcrossed to an individual with normal chromosomes,the recombinant frequency in progeny will be:

A) more than 20%.
B) 20%.
C) less than 20%,but more than 10%.
D) 10%.
E) less than 10%.