In Comparing the Genomes of Humans and Those of Other

question 40

Multiple Choice

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome 2 among our 46 chromosomes, whereas the other primates of this group have 48 chromosomes and any pair like the human chromosome 2 pair is not present; instead, the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

• A) The ancestral organism had 48 chromosomes and at some point a centric fusion event occurred and provided some selective advantage.
• B) The ancestral organism had 46 chromosomes, but primates evolved when one of the pairs broke in half.
• C) At some point in evolution, human ancestors and primate ancestors were able to mate and produce fertile offspring, making a new species.
• D) Chromosome breakage results in additional centromeres being made in order for meiosis to proceed successfully.
• E) Transposable elements transferred significantly large segments of the chromosomes to new locations.

---

Definitions:

Restrictive Employment Contract

A contract between an employer and employee that limits the latter's actions both during and after the period of employment, often including clauses like non-compete, non-disclosure, and non-solicitation.

Patent And Trademark Office

An agency of the U.S. Department of Commerce responsible for granting patents for inventions and registering trademarks.

Federal Law

Legislation that has been enacted by the national government and applies throughout the country.

Service Mark

A type of trademark used to identify and distinguish the services (rather than goods) provided by one entity from those of others.