Red fruits (T-) is dominant to tangerine fruits (tt), and smooth leaf (H-) is dominant to hair leaf (hh). Suppose the recombination frequency between these genes is 16%. You take a pure-breeding plant with red fruits and smooth leaves and cross it with a pure-breeding plant with tangerine fruits and hairy leaves. You perform a test-cross with the F1 generation and produce 500 offspring. What is the approximate number of offspring for each possible phenotype?

A. 40 red, smooth; 40 tangerine, hairy; 210 red, hairy; 210 tangerine, smooth

B. 40 red, smooth; 40 tangerine, hairy; 40 red, hairy; 40 tangerine, smooth

C. 42 red, smooth; 42 tangerine, hairy; 8 red, hairy; 8 tangerine, smooth

D. 84 red, smooth; 84 tangerine, hairy; 16 red, hairy; 16 tangerine, smooth

E. 210 red, smooth; 210 tangerine, hairy; 40 red, hairy; 40 tangerine, smooth

When you perform a three-point test cross to determine the linkage between three genes, you found that distance between the three genes were 16 and 8 map units. Of 1000 progeny produced in the test cross, you observe 7 double recombinants. What is the interference?

A.
0.547

B.
0.453

C.
0.16

D.
0.08

E.
0.0128