Semester 2 Review

Front

What is the selective agent in natural selection?

Back

The environment.

Front

In a human-influenced world, what is the main focus of organisms under artificial selection?

Back

Producing traits desired by humans.

Front

Who decides which organisms should be bred together in selective breeding?

Back

Humans.

Front

What term describes all the possible gene combinations in a population?

Back

Gene pool.

Front

What do the letters A, G, C, and T represent in DNA nucleotides?

Back

Nitrogenous bases.

Front

Define natural selection.

Back

The process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is artificial selection?

Back

The intentional breeding of organisms to produce desired traits.

Front

What is a gene?

Back

A segment of DNA that contains the instructions for building a specific protein.

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

Front

What is a genotype?

Back

The genetic constitution of an individual organism.