Nature vs. Nuture

If the ability to roll one’s tongue is dominant (R) and the inability to roll one’s tongue is recessive (r), what are the possible genotypes for someone who can roll their tongue?

• only RR

• RR and Rr

• RR and rr

• only rr

Most theorists today agree that behavior is dictated by

• nature only

• nurture only

• a combination of nature and nurture

• none of the above

Human behavior is not affected by the nutritional habits of one's family.

• True

• False

Traditions and religion passed down in a family may influence how a person behaves.

• True

• False

Which of the following is NOT a way that family influences one's behavior?

• morals

• religion

• nutrition

• All of the above influence behavior

Humans have 46 _______ in each cell: 23 from the mother and 23 from the father.

• alleles

• chromosomes

• Punnett squares

• genes

_______ are small segments of DNA that serve as the biochemical units of heredity. Like chromosomes, they operate in pairs, and these pairs can affect a particular process or personal characteristics.

• Double helixes

• Cells

• Molecules

• Genes

A _________ gene is expressed each time it is present in a person, whereas a ________ gene is only expressed when it is paired with another recessive gene.

• recessive... dominant

• dominant... recessive

• dominant... dominant

• recessive... recessive

Genes consist of hormones that regulate bodily functions.

• True

• False

Genes are DNA segments that are carried in each chromosome.

• True

• False