In a Drosophila Experiment, a Cross Was Made Between Homozygous

question 3

Multiple Choice

In a Drosophila experiment, a cross was made between homozygous wild-type females and yellow-bodied males. All of the resulting F₁s were phenotypically wild type. However, adult flies of the F₂ generation (resulting from matings of the F₁s) had the characteristics shown in the figure.
- How is the mutant allele for yellow body inherited?

• A) It is recessive.
• B) It is codominant.
• C) It is dominant.
• D) It is incompletely dominant.

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Definitions:

Anally Fixated

A term from Freudian psychoanalysis indicating a person who is said to have unresolved conflicts during the anal stage of development, potentially leading to traits such as obsessiveness, stinginess, or orderliness.

Anal Stage

The second stage in Freud's psychosexual development, characterized by a focus on controlling bladder and bowel movements.

Personality

Describes the unique set of emotional, attitudinal, and behavioral response patterns of an individual.

Sexual Instincts

The innate or biologically driven forces that motivate individuals to seek out sexual activities or behaviors.