Chapter 17

Front

What is a tumor suppressor gene?

Back

A gene that, when a loss-of-function mutation occurs, leads to the formation of a tumor.

Front

Who were the first two genetically modified human babies?

Back

Lulu and Nana.

Front

What is the function of a telomere?

Back

To protect the ends of chromosomes from damage and prevent loss.

Front

What is the leading cause of death in the US?

Back

Heart disease.

Front

What is the second leading cause of death in the US?

Back

Cancer.

Front

Have any humans been cloned?

Back

No, humans have not been cloned.

Front

What barriers exist to human cloning?

Back

Ethical and legal barriers.

Front

What happens when a tumor suppressor gene is mutated?

Back

It can lead to uncontrolled cell growth and tumor formation.

Front

What role do telomeres play in cellular aging?

Back

They shorten with each cell division, contributing to aging and limiting the number of divisions.

Front

What ethical concerns are associated with genetic modification in humans?

Back

Concerns include potential long-term effects, consent, and the implications of 'designer babies'.