Biology Final Review

Front

What is a phenotype?

Back

The physical expression of a trait, such as blue eyes.

Front

What does genotype refer to?

Back

The possible combination of alleles in a gene.

Front

What is evolution?

Back

The gradual change in species over time.

Front

Which base does adenine bond with in DNA?

Back

Thymine.

Front

What is taxonomy?

Back

The science concerned with the naming and classification of organisms.

Front

What is an allele?

Back

A variant form of a gene.

Front

What is natural selection?

Back

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

Front

What is a dominant allele?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present.

Front

What is a gene?

Back

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