For a group of individuals, the heritability score for a particular trait = .5. What can be said about the heredity of this trait?

For a group of individuals, the heritability score for a particular trait = .5. What can be said about the heredity of this trait?

a. Hereditary differences account for all of the observed differences for this group of individuals.
b. Hereditary differences account for none of the observed differences for this group of individuals.
c. Hereditary differences account for some of the observed differences for this group of individuals.
d. The differences found within this group are mostly due to differences in the environment.

If a group of individuals shares a highly similar environment, what effect does this have on the heritability estimate of a characteristic?

If a group of individuals shares a highly similar environment, what effect does this have on the heritability estimate of a characteristic?

a. Heritability will be low.
b. Heritability will be high.
c. Heritability estimates will be unaffected.
d. It is determined by the power of the environmental factors.

What are the chances of having a child with at least one dominant gene if both parents are heterozygous?

What are the chances of having a child with at least one dominant gene if both parents are heterozygous?

a. 25%
b. 50%
c. 75%
d. 100%
e. Can't determine

On a given trait, high heritability suggests that:

On a given trait, high heritability suggests that:

a. adopted children will closely resemble their biological parents.
b. adopted children will closely resemble their adoptive parents.
c. identical twins will be less similar to each other than adopted siblings.
d. fraternal twins will be more similar to each other than identical twins.

Under what conditions are the effects of sex-limited genes demonstrated?

Under what conditions are the effects of sex-limited genes demonstrated?

a. When they are dominant
b. When they are homozygous
c. When particular hormones are present
d. When they appear on the X chromosome

Which of the following is the BEST explanation for why males can grow breasts under certain hormonal conditions?

Which of the following is the BEST explanation for why males can grow breasts under certain hormonal conditions?

a. Sex-linked genes become activated.
b. The Y chromosome becomes activated.
c. Sex-limited genes become activated.
d. Breast growth is linked to color vision deficiency.

A gene is found that controls the age at which a man grows bald, if at all. That gene seldom affects women, even if they have the gene. What kind of gene is this MOST likely to be?

A gene is found that controls the age at which a man grows bald, if at all. That gene seldom affects women, even if they have the gene. What kind of gene is this MOST likely to be?

a. an X-linked gene
b. a sex-limited gene
c. a sex-linked dominant gene
d. a sex-linked recessive gene

Sex-limited genes are present:

Sex-limited genes are present:

a. in males only.
b. in females only.
c. in both sexes.
d. on enzymes.

Sex-limited genes are found on:

Sex-limited genes are found on:

a. X chromosomes only.
b. Y chromosomes only.
c. X AND Y chromosomes.
d. any chromosomes.

Males are more likely than females to exhibit color vision deficiency because of a gene that is:

Males are more likely than females to exhibit color vision deficiency because of a gene that is:

a. sex-limited.
b. recessive and sex-linked.
c. crossing over.
d. dominant and sex-linked.

Genes located on the sex chromosomes are called:

Genes located on the sex chromosomes are called:

a. sex-linked.
b. sex-limited.
c. autosomal.
d. recombination.

Color vision deficiency is more common in males than in females because it is controlled by a:

Color vision deficiency is more common in males than in females because it is controlled by a:

a. sex-limited gene.
b. Y-linked gene.
c. dominant X-linked gene.
d. recessive X-linked gene.

An example of a sex-linked trait is:

An example of a sex-linked trait is:

a. eye color.
b. color vision deficiency.
c. temperament.
d. intelligence.

If a characteristic is controlled by an X-linked recessive gene, it produces its apparent effects:

If a characteristic is controlled by an X-linked recessive gene, it produces its apparent effects:

a. more often in males.
b. more often in females.
c. only in childhood.
d. only after puberty.

In general, when biologists speak of sex-linked genes they are referring to genes on:

In general, when biologists speak of sex-linked genes they are referring to genes on:

a. autosomal chromosomes.
b. more than one chromosome.
c. the X chromosome.
d. the Y chromosome.

In humans, which chromosome(s) contain(s) few genes?

In humans, which chromosome(s) contain(s) few genes?

a. All human chromosomes contain few genes.
b. Both the X and Y chromosomes contain few genes.
c. The X chromosome contains few genes.
d. The Y chromosome contains few genes.

Which of the following pairs of sex chromosomes would be found in a normal male mammal?

Which of the following pairs of sex chromosomes would be found in a normal male mammal?

a. XX
b. XY
c. YY
d. YZ

An autosomal gene is a gene:

An autosomal gene is a gene:

a. on the X chromosome.
b. on the Y chromosome.
c. on any chromosome other than the X or Y chromosome.
d. that shows no evidence of crossing over.

Almost all humans have 23 pairs of which of the following?

Almost all humans have 23 pairs of which of the following?

a. RNA
b. Chromosomes
c. Genes
d. Corduroys
e. Veins

Suppose that adopted children are more similar to their biological parents than their adoptive parents in their preferences for a flavor of ice cream. Which of the following would be true?

Suppose that adopted children are more similar to their biological parents than their adoptive parents in their preferences for a flavor of ice cream. Which of the following would be true?

a. Heritability of this trait is high.
b. Preferences for ice cream are determined solely by the environment.
c. Flavors of ice cream are naturally selected.
d. Heritability of this trait is low.