Genes and Molecular Machines Lesson 1 Exam

Front

What is genetics?

Back

Genetics is the study of heredity and variation in organisms.

Front

What is heredity?

Back

Heredity is the passing of traits from parents to offspring.

Front

Why is variation within a population important?

Back

Variation increases a population’s ability to adapt.

Front

How does natural selection influence traits in a population?

Back

Natural selection leads to the development of traits that improve survival being passed on more frequently.

Front

What primarily influences the characteristics of an organism?

Back

Genetic inheritance primarily influences the characteristics of an organism.

Front

Define a gene.

Back

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

Front

What is a mutation?

Back

A mutation is a change in the DNA sequence that can lead to changes in traits.

Front

Explain the role of DNA in heredity.

Back

DNA carries genetic information that is passed from parents to offspring.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are expressed only when two recessive alleles are present.

Front

What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.