The Ability to Curl One's Tongue into a U-Shape Is

Multiple Choice

The ability to curl one's tongue into a U-shape is a genetic trait. Curlers always have at least one curler parent but noncurlers can have one or both parents who are curlers. Using C and c to symbolize the alleles that control this trait, what is the genotype of a noncurler?

A) CC
B) Cc
C) cc
D) CC or Cc