Genetics polygenic inheritance & probability

[shawonna23]

1. Homework Statement

Height is a characteristic resulting from polygenic inheritance. If genes at four loci code for height, what is the probability that parents with the genotypes RrSSTtUu and RrSsTtUU will have a child possessing 8 tall alleles?
Choose one answer.
a. 1/128
b. 1/256
c. 0
d. 1/64



2. Homework Equations [/b]

PUNNET SQUARES

3. The Attempt at a Solution [/b]
1/64

1/4 RR, 1/2 SS, 1/4 TT, 1/2 UU

1/4 * 1/2 * 1/4 * 1/2= 1/64

 

[redpenguin]

Exactly, I'm glad you see the pattern. Genetics is pretty fun once you get the hang of it.

 

[shawonna23]

Thanks!