In a Hypothetical Experiment, Researchers Sequence a Gene from a Colony

question 40

Multiple Choice

In a hypothetical experiment, researchers sequence a gene from a colony of bacteria at various times in the history of the colony.In the common ancestor, the nucleotide at site 998 is A.After 1,500 generations, it changes to G.After 5,000 generations, it changes back to A.We can infer that a total of _______ substitution(s) have occurred.Without knowledge of the sample taken at 1,500 generations, we would have inferred that _______ substitution(s) had occurred.

• A) one; zero
• B) one; one
• C) two; zero
• D) two; one
• E) two; two

---

Definitions:

Psychosexual Development

A Freudian theory that children develop through a series of stages related to the erogenous zones; unsatisfactory completion of these stages can lead to neuroses in adulthood.

Psychodynamic Theories

Theories in psychology that emphasize systematic study of the psychological forces underlying human behavior, feelings, and emotions and how they might relate to early experience.

Genital Stage

In Freudian psychology, the final stage of psychosexual development, occurring during puberty, where sexual energies are focused on the genitals.

Psychosexual Development

A Freudian concept describing how personality development is linked to sexual development from early childhood through various phases of childhood.