Lily Plants Sometimes Have Twice as Many Chromosomes Per Cell

question 31

Multiple Choice

Lily plants sometimes have twice as many chromosomes per cell as their parent plants had. Which of the following explains how this might have happened?

• A)The lily's sister chromatids failed to separate during meiosis.
• B)The chromosome number of the lily went from 2n to 1n.
• C)The lily gametes fused during mitosis.
• D)The parent plant lost half of its chromosomes during mitosis.

---

Definitions:

Testosterone Levels

The concentration of the male sex hormone testosterone found in the bloodstream, affecting various aspects of physical and sexual development as well as mood.

Sexual Response Cycle

A model describing the phases of physiological response to sexual stimulation, typically including stages like excitement, plateau, orgasm, and resolution.

Refractory Period

A period immediately following an action (like a nerve impulse) during which a cell or organ cannot repeat that action, which in human sexuality refers to a recovery phase after orgasm during which it is physiologically impossible for a man to have additional orgasms.

Excitement Stage

The excitement stage is the initial phase in the sexual response cycle where physical and emotional sensations of arousal are heightened.