Biology Genetics polygenic inheritance & probability

AI Thread Summary
The discussion focuses on calculating the probability of two parents with specific genotypes producing a child with eight tall alleles, given that height is determined by polygenic inheritance across four loci. The calculated probability is 1/64, derived from the Punnett square analysis of the parents' genotypes RrSSTtUu and RrSsTtUU. The breakdown of allele combinations shows that the probability for each locus contributes to the overall calculation. Participants express enjoyment in understanding the genetic patterns involved. The conclusion emphasizes the fun aspect of genetics once the concepts are grasped.
shawonna23
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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
 
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Exactly, I'm glad you see the pattern. Genetics is pretty fun once you get the hang of it.
 
Thanks!
 
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