Question 1

In the liability model higher MZ than DZ concordance rates for alcohol dependency stems from:

Accepted Answer

the total influence from all genetic and environmental sources

Question 2

Gene-environment interactions explain why:

Accepted Answer

genes can have different effects in varying environments

Question 3

Which is least applicable to the relationship between parental and children's drinking?:

Accepted Answer

daughters of heavily drinking parents more likely to show an aversion effect

Question 4

The Danish adoption study of 55 male offspring of alcoholic parents found:

Accepted Answer

a and b

Question 5

All of the following were the findings from the proband studies except:

Accepted Answer

First-degree female, but not male, relatives of alcoholic probands were more likely alcoholic than for the general population

Question 6

A gene-environment interaction view looks at the ___________ influence of heredity and environment by looking at how genetic propensities are affected by the environmental opportunities that are available.

Accepted Answer

Joint

Question 7

A family study of drug use (Merikangas et al., 1998) found:

Accepted Answer

higher alcoholism for relatives of alcohol- and cannabis-dependents

Question 8

Results from U.S. adoption studies in Iowa:

Accepted Answer

generally concur with adoption studies in other countries

Question 9

Adoption studies are not without a number of problems such as:

Accepted Answer

a and b

Question 10

A well-controlled adoption studyof the genetic basis for alcoholism requires all but:

Accepted Answer

adopters who are alcoholic

Question 11

Research on possible familial links to alcohol and drug problems problems use the term _________ for individuals assumed to be at risk for alcohol and other drug dependency due to having at least one biological parent with a similar problem.

Accepted Answer

Probands

Question 12

The Collaborative Study on the Genetics of Alcoholism XE "Collaborative Study on the Genetics of Alcoholism" (COGA) that compared first degree relatives of alcoholics and controls found all but:

Accepted Answer

DSM-III-R alcohol abuse much higher in alcohol probands

Question 13

Molecular genetics include all but following view of alcoholism:

Accepted Answer

It is independent of environmental factors

Question 14

In Swedish studies, adopted sons with alcoholic biological fathers were:

Accepted Answer

more likely to be alcoholic than were adopted sons of nonalcoholic fathers

Question 15

Phenotypes and genotypes are analogous to:

Accepted Answer

overt actions and un derlying motives

Question 16

Twin studies pertaining to alcoholism have found which of the following?

Accepted Answer

High concordance rates among MZ and DZ twins

Question 17

What did the VATSPUD study find overall regardless of the drug?:

Accepted Answer

Higher heritabilit y estimates for dependence among MZ than for DZ twins

Question 18

For alcoholism among male and female same-sex identical twins (Pickens et al., 1991) genetic factors were:

Accepted Answer

stronger for identical than fraternal twins for males

Question 19

Concordance rates of alcoholism have:

Accepted Answer

often been higher among MZ twins than for DZ twins

Question 20

Kendler et al.'s Virginia Twin Registry study:

Accepted Answer

found a genetic basis for alcoholism in women

Quiz 6: Heredity and Environment: Alcohol and Other Drug Use