Question

You cross a YyTtRrSs to a YyTtRrSs. What percent of offsprings will be YYTTRRSS?

A) 1/256
B) 2/256
D) 3/4
C) 0

Answer 1

A) 1/256

Step-by-step explanation:

Parent 1 : YyTtRrSs

Parent 2: YyTtRrSs

Probability of a YY offspring occurring in a cross between Yy and Yy = 1/4

Probability of a TT offspring occurring in a cross between Tt and Tt = 1/4

Probability of a RR offspring occurring in a cross between Rr and Rr = 1/4

Probability of a SS offspring occurring in a cross between Ss and Ss = 1/4

Total probability of YYTTRRSS =

1/4 * 1/4 * 1/4 * 1/4 = 1/256

Hence, 1/256 of offspring will be YYTTRRSS