Question 1

Down syndrome originates from:

Accepted Answer

Down syndrome is caused by a chromosomal anomaly, specifically the presence of an extra copy of chromosome 21, known as trisomy 21.

Question 2

A study that examines whether adopted children's scores on a particular measure are more highly correlated with their adoptive parents' scores or their biological parents' scores is referred to as a(n) study.

Accepted Answer

This type of study is called an adoption study. It investigates the influence of genetics versus environment by comparing adopted children to both their biological and adoptive parents.

Question 3

Traits that are influenced by genetic factors are considered:

Accepted Answer

Traits that are influenced by genetic factors are considered heritable because they can be passed down from parents to offspring through genes.

Question 4

Pamela and her mother both have a strong aversion to cheese. What could have caused this similarity?

Accepted Answer

Pamela could have inherited the aversion genetically (A), or she could have developed it due to environmental influence from her mother (B).

Question 5

The research on the effects of abusive parenting on children with a particular genotype demonstrated that:

Accepted Answer

Research indicates that certain genetic predispositions can make individuals more vulnerable to negative environmental influences, such as abusive parenting, highlighting the interaction between genetics and environment.

Question 6

An adoption twin study is conducted to examine the role of genetics and environment on sociability. Which of the following results would lead to a conclusion that environmental factors are important in the development of this trait?

Accepted Answer

The answer of An adoption twin study is conducted to...

Question 7

Behavior genetics rests in part on the premise that, to the extent that genetic factors are important, individuals who should be more similar than individuals who .

Accepted Answer

Behavior genetics suggests that individuals who are closely related (e.g., siblings, twins) should be more similar in traits influenced by genetics than individuals who are unrelated.

Question 8

The influence of the child's on his or her
represents the active child theme.

Accepted Answer

The active child theme refers to how a child's phenotype (observable characteristics) can influence and shape their environment.

Question 9

A twin study is conducted to examine the role of genetics and environment on the fondness of individuals for chocolate. Which of the following
results would lead to the conclusion that genetic factors are important in the development of this trait?

Accepted Answer

The answer of A twin study is conducted to examine...

Question 10

Which of the following effects is an example of the
"child's phenotype ? child's environment" relation?

Accepted Answer

The "child's phenotype ? child's environment" relation refers to how a child's characteristics (phenotype) influence the environment they experience. Both B and C describe scenarios where the child's traits or behaviors affect their environment.

Question 11

Behavior genetics rests in part on the premise that, to the extent that environmental factors are important, individuals who should be more similar than individuals who .

Accepted Answer

The answer of Behavior genetics rests in part on the...

Question 12

Twin studies compare:

Accepted Answer

Twin studies often compare identical twins, who share 100% of their genes, to fraternal twins, who share about 50% of their genes, to understand the influence of genetics versus environment on various traits.

Question 13

Lenny is a very active toddler who began to crawl, pull himself up to a standing position, walk, climb, and run at a very early age. Which of the following statements is NOT an example of a way in which Lenny's phenotype may affect his environment?

Accepted Answer

The answer of Lenny is a very active toddler who...

Question 14

If the correlation between identical twins on Trait R is higher than the correlation between fraternal twins on Trait R, behavior geneticists conclude that:

Accepted Answer

A higher correlation in identical twins compared to fraternal twins suggests a genetic influence on Trait R, as identical twins share more genetic material.

Question 15

A person who has a genetic disorder that results from a chromosomal anomaly possesses:

Accepted Answer

Chromosomal anomalies typically involve having more or fewer than the normal number of chromosomes, which can lead to genetic disorders.

Question 16

Which of the following properties is a mechanism for genetic inheritance of disease?

Accepted Answer

All the listed mechanisms (combined action of multiple genes, dominant-recessive patterns, and sex-linked inheritance) are ways through which genetic diseases can be inherited.

Question 17

Which of the following statements about autism spectrum disorder is NOT true?

Accepted Answer

The answer of Which of the following statements about autism...

Question 18

Which of the following designs is ideal for studying behavior genetics?

Accepted Answer

An adoptive twin study is ideal for studying behavior genetics because it combines the strengths of both adoption and twin studies, allowing researchers to disentangle the effects of genetics and environment on behavior by comparing identical twins raised apart.

Question 19

Which of the following disorders involves sex chromosomes?

Accepted Answer

Kleinfelter syndrome involves an extra X chromosome in males, making it a sex chromosome disorder.

Question 20

Behavior geneticists believe that of the behavioral traits of human beings are influenced at least to some degree by genetic factors.

Accepted Answer

The answer of Behavior geneticists believe that of the behavioral...

Quiz 3: Biology and Behavior