Pretest

Question 1

How did the discovery of the rhesus factor affect society?

Revolt · Accepted Answer

D: New treatments during pregnancy could prevent harm to the developing child.

Question 2

If you inherit the genotype AO for blood from your parents, what blood type do you have?

Revolt · Accepted Answer

C: A

Question 3

The allele for curly hair is incompletely dominant. If a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents?

Revolt · Accepted Answer

C: 100 percent

Question 4

John and Pat are identical twins with identical DNA. John works in a movie theater, and Pat works as a lifeguard. They have very different skin pigmentation. Which is the best explanation of the difference?

Revolt · Accepted Answer

D: Skin color, a polygenic trait, is also determined by environmental factors.

Question 5

A purebred purple flowering plant is crossed with a purebred white flowering plant, and they produce offspring that have purple flowers. Which is the trait for purple flowers?

Revolt · Accepted Answer

A: dominant

Question 6

Why is it important to know a person's rhesus factor before a blood transfusion?

Revolt · Accepted Answer

A: A patient who is Rh– can receive only ​​​​​​​Rh–​​​​​​​ blood.

Question 7

If blood is in short supply, which blood type would be the most beneficial to have on hand if someone needed a blood transfusion?

Revolt · Accepted Answer

D: O–

Question 8

If a red cow (homozygous dominant) is crossed with a white cow (homozygous dominant), what alleles will the offspring have?

Revolt · Accepted Answer

B: RW

Question 9

Which inheritance pattern results when parents with pure traits are crossed and the resulting offspring have traits that appear to be a blend of the parents' traits?

Revolt · Accepted Answer

D: incomplete dominance

Question 10

A student recorded the height of each student in the school. She then made a bar graph of her results. She observed that the results form a bell-shaped curve. The student could use her graph as evidence to support which argument?

Revolt · Accepted Answer

A: Height is affected by multiple pairs of genes on different chromosomes.

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