ETHC 101_quiz_one.docx-19.pdf

Question 1

3 out of 3 points

A mutation in the LDL receptor gene can cause a dramatic rise in serum cholesterol.

Selected Answer: True

Question 2

3 out of 3 points

A biblical view of race shows that all races are equal because they are all of one blood in

Adam.

Selected Answer: True

Question 3

3 out of 3 points

At the chromosome levels males are homogametic.

Selected Answer: False

Question 4

3 out of 3 points

Which of the following genes can influence heart health?

Selected Answers: Genes controlling lipid levels

Genes controlling blood pressure

Genes controlling LDL levels

Question 5

3 out of 3 points

In mother’s who are carriers for colorblindness even though they are not color blind some of

their individual eye cone cells can express the trait. Also in female Calico cats the genes

which produce color are found on the X chromosome and each hair cell expresses one X

allele or the other giving rise to a random pattern of color in their fur. In both cases this is an

example of:

Selected Answer: X-inactivation

Question 6

3 out of 3 points

Melanocytes contribute to skin color;

Selected Answer: By containing melanin in packets called melanosomes

Question 7

3 out of 3 points

Cardiovascular disease affects:

Selected Answers: 1 in 3 individuals

Question 8

3 out of 3 points

Epigenetics plays a role in controlling weight gain as shown in experiments with genetically

determined obese mice. Obese female mice were able to decrease obesity in their offspring by

eating a diet rich in:

Selected Answer: Food products which promote methylation

Question 9

3 out of 3 points

In general there is no male-to male transmission of X-linked traits.

Selected Answer: True

Question 10

3 out of 3 points

Research studies which try to show a physiological or genetic basis for homosexuality have

focused on a gene called Xq28 and the size of a certain brain region.

Selected Answer: True

Question 11

3 out of 3 points

Which of the following is true about the “X” and “Y” chromosomes?

Selected Answers: The Y chromosome contains about 231 genes

The X chromosome contains over 1500 genes

The Y chromosome is not found in some male animals

Question 12

3 out of 3 points

Even though Mendel’s laws are very helpful to understanding genetics, simple mendelian

genetics does not explain well most of genetics because;

Selected

Answers: Many phenotypic traits are polygenic

Many phenotypic traits are also multifactorial (influenced by the

environment)

Question 13

3 out of 3 points

Daughters can inherit sex linked recessive disease if:

Selected Answer: The mother is a carrier and the father has the disease

Question 14

3 out of 3 points

The human male is considered hemizygous for X-linked traits, because he only has one set of

X-linked genes.

Selected Answer: True

Question 15

3 out of 3 points

A color blind father married to a non-color blind mom (non-carrier of colorblindness) can

produce a color blind son.

Selected Answer: False

Question 16

3 out of 3 points

In the U.S. the “sex ratio” of males to females drops significantly from birth to age 65.

Selected Answer: True

Question 17

3 out of 3 points

The mechanism of genomic imprinting involves:

Selected

Answer: Methylation (methyl groups added to certain DNA regions silencing the

gene)

Question 18

3 out of 3 points

Body weight is controlled primarily by one gene.

Selected Answer: False

Question 19

3 out of 3 points

The SRY gene found on the X chromosome causes the unborn baby to develop into a girl.

Selected Answer: False

Question 20

3 out of 3 points

A person who is male but who prefers women’s clothing and does not have an abnormal XY

or XX condition is known as;

Selected Answer: A transvestite

Question 21

3 out of 3 points

Which of the following are polygenic multifactorial traits?

Selected Answers: Height

Skin color

Body weight

Question 22

3 out of 3 points

For treatment of heart disease statin drugs are used to;

Selected Answer: block an enzyme the liver uses to make cholesterol

Question 23

3 out of 3 points

This famous discoverer of the DNA structure made racist comments in the 1990s based on the

idea that certain people groups were biologically inferior.

Selected Answer: James Watson

Question 24

3 out of 3 points

Which of the following hunger response hormones increases appetite?

Selected Answer: Ghrelin

Question 25

3 out of 3 points

More than 100 genes affect pigmentation in skin hair and irises.

Selected Answer: True

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