Gene S Controls the Sharpness of Spines in a Type

question 15

Multiple Choice

Gene S controls the sharpness of spines in a type of cactus.Cactuses with the dominant allele,S,have sharp spines,whereas homozygous recessive ss cactuses have dull spines.At the same time,a second gene,N,determines whether or not cactuses have spines.Homozygous recessive nn cactuses have no spines at all.The relationship between genes S and N is an example of

• A)incomplete dominance.
• B)epistasis.
• C)complete dominance.
• D)pleiotropy.

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Definitions:

Song Matching

A behavioral phenomenon where a bird responds to the song of another individual with a song that is similar in structure and pattern.

Young Adult

An individual in the transitional phase of growth and development between adolescence and full adulthood, typically considered to be in their late teens to early twenties.

Neighbor's Song

The vocalizations produced by conspecific birds located in adjacent territories, which can influence territory establishment, mate attraction, and competitive interactions.

Darwinian Natural Selection

The process by which organisms better adapted to their environment tend to survive and produce more offspring, leading to evolutionary changes over time.