Question

The ability of a person to curl their tongue in a U-shape is determined by an allele passed down from at least one parent. The child does not have to have two copies of

the U-shape tongue allele to show the U-shape trait. Which term best describes the U-shape tongue trait?
Ohybridization
O recessive
O genotype
O dominant

Answer 1

Answer: The term that best describes the U-shape tongue trait in this context is dominant.

Explanation: In genetics, traits are determined by alleles, which are different versions of a gene. Alleles can be dominant or recessive. If an individual only needs one copy of the allele to express the trait, it is a dominant allele. In this case, the ability to curl the tongue into a U-shape is determined by an allele that is dominant, meaning if the allele is present, the trait will be expressed, regardless of the presence of other alleles.