Refer to the Following Information to Answer the Questions Below

question 42

Multiple Choice

Refer to the following information to answer the questions below.
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.
-A cross between a true-breeding sharp-spined cactus and a spineless cactus would produce

• A) all sharp-spined progeny.
• B) 50% sharp-spined, 50% dull-spined progeny.
• C) 25% sharp-spined, 50% dull-spined, 25% spineless progeny.
• D) all spineless progeny.
• E) It is impossible to determine the phenotypes of the progeny.

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Definitions:

Genetic Factors

Elements within an organism's genes that can influence its traits and characteristics, including physical appearance, behavior, and susceptibility to diseases.

Collective Unconscious

A concept in Jungian psychology referring to the part of the unconscious mind that is shared among beings of the same species, consisting of inherited, universal themes.

Instinctual Satisfaction

The fulfillment of innate biological drives or needs, such as hunger or sexual desire.

Basically Good

A philosophical and psychological concept suggesting that human nature is fundamentally benevolent or positive.