Question 1

Which of the following best describes the relationship between genes, DNA, and chromosomes?

Accepted Answer

Genes are segments of DNA, and chromosomes are structures that organize and package DNA.

Question 2

Which statement about genotype and phenotype is correct?

Accepted Answer

Genotype refers to the genetic makeup of an individual, while phenotype refers to observable traits.

Question 3

In twin studies, which type of twins share 100% of their genetic material?

Accepted Answer

Monozygotic (identical) twins

Question 4

Heritability is best defined as:

Accepted Answer

The proportion of variation in phenotype across people due to differences in genotype.

Question 5

Which equation correctly represents the calculation of heritability as a proportion?

Accepted Answer

$$ h^2$ = \frac{V_g}{V_p} $$

Question 6

Why is it incorrect to say, 'His mother was an alcoholic, so he probably inherited the genes and will be one too'?

Accepted Answer

Both B and C.

Question 7

Which of the following is NOT true about heritability?

Accepted Answer

Heritability can be influenced by environmental factors.

Question 8

In psychological research, why are twin studies useful?

Accepted Answer

They allow researchers to control for genes or the environment.

Question 9

Which of the following best explains why heritability estimates cannot be applied to individuals?

Accepted Answer

Heritability measures the proportion of trait variation due to genetics in a population, not in a single person.

Question 10

Which statement about the influence of genes and environment on behavior is most accurate?

Accepted Answer

Behavior results from the interaction of genes and environment.

Question 11

If a trait has a heritability estimate of $$ h^2$ = 0.8 $$, what does this mean?

Accepted Answer

80% of the variation in the trait in the population is due to genetic differences.

Question 12

Which of the following is the correct order from smallest to largest for levels of genetic material organization?

Accepted Answer

Genes $$\rightarrow$$ DNA $$\rightarrow$$ Chromosomes

Question 13

Which of the following is an example of a phenotype?

Accepted Answer

Having blue eyes

Question 14

Which of the following is a misconception about heritability?

Accepted Answer

Heritability means a trait is inherited directly from parents.

Question 15

Which scenario best illustrates the concept of gene-environment interaction?

Accepted Answer

A child with a genetic predisposition for high intelligence excels in a stimulating educational environment.

Question 16

Which of the following is true regarding monozygotic and dizygotic twins in genetic studies?

Accepted Answer

Monozygotic twins share 100% of their genes, while dizygotic twins share about 50%.

Question 17

Which of the following is NOT a reason why twin studies are useful in psychology?

Accepted Answer

They always result in identical outcomes for all traits.

Question 18

Which of the following statements about chromosomes is correct?

Accepted Answer

Chromosomes are thread-like structures that organize and package DNA.

Question 19

Which of the following best describes the concept of heritability in psychology?

Accepted Answer

It is the proportion of trait variation in a population due to genetic differences.

Question 20

Which of the following is an example of a genotype?

Accepted Answer

Having the alleles AA for a particular gene

Genes, Environment, and Heritability: Foundations for Psychology

Study Guide - Practice Questions