In genetics, the dash symbol (-) is a "wild card" that stands for either the dominant allele or the recessive allele; for example, R- means the individual has either the genotype RR or Rr. In Duroc-Jersey pigs, genotypes R- S- have a red coat color, R- ss and rr S- have sandy-colored coats, and rr ss pigs are white. R and S show independent assortment. What is the ratio of red : sandy : white among progeny of the cross Rr Ss × Rr Ss?
A)12:3:1
B)9:3:1
C)10:3:3
D)9:6:1
E)None of the answer options is correct.

Question

Quizplus · Accepted Answer

The ratio of red (R- S-) : sandy (R- ss and rr S-) : white (rr ss) is 9:6:1.

In Genetics, the Dash Symbol (-) Is a "Wild Card