CH 4 Review Q's Flashcards Preview

PsychBio > CH 4 Review Q's > Flashcards

Flashcards in CH 4 Review Q's Deck (11)
Loading flashcards...
1
Q

What is a sex-linked gene?

A

A gene on either the X or Y chromosome

2
Q

What is a sex-limited gene?

A

A gene that has greater effects on one sex than the other

3
Q

What does a microdeletion remove?

A

Part of a chromosome

4
Q

How does an epigenetic change differ from a mutation?

A

An epigenetic change alters gene activity without replacing any gene.

5
Q

How does adding a methyl or acetyl group to a histone protein alter gene activity?

A

A methyl group turns genes off. An acetyl group loosens histone’s grip and increases gene activation.

6
Q

Most estimates of heritability of human behavior use what type(s) of evidence?

A

Comparisons of twins and studies of adopted children

7
Q

What is the difference between monozygotic (MZ) and dizygotic (DZ) twins?

A

MZ twins develop from a single egg, whereas DZ twins develop from two eggs.

8
Q

Which of the following offers strong evidence that environmental changes can largely counteract the effect of a gene?

A

The effects of diet on children with phenylketonuria (PKU)

9
Q

Which of these is responsible for evolutionary changes in a species?

A

Individuals with certain genes reproduce more than average.

10
Q

What, if anything, can we predict about the future of human evolution?

A

People will become more like whichever people tend to have the most children.

11
Q

Why do human infants show a grasp reflex?

A

The reflex was advantageous to infants of our remote ancestors.