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.