Exam 28: Evolutionary Genetics

Proteins that are functionally less important for the survival of an organism generally evolve _____ more important proteins.

Orthologous genes may form gene families in a species.

What form of cladogenesis occurs due to geographic separation of a population?

The formation of polyploids in plants is an example of which model of cladogenesis?

The production of sterile offspring is an example of a prezygotic isolation mechanism.

Microevolution is the term given to evolutionary changes that produce new species and groups of species.

A graphic illustration of the relationships between species is called a phylogenetic tree.

Horizontal gene transfer is most common among what group of organisms?

Molecular clocks are based on _____ mutations.

One theory of human evolution suggests that Homo erectus evolved directly into Homo sapiens (humans), after which point Homo erectus became extinct. If this is true, humans arose by ______.

What type of cladogenesis occurs when a new species arises in the same habitat as the species from which it was derived?

You are studying a new strain of bacteria. You discover that its genome contains some genes that are not found in any form in its most recent ancestor. You suspect