Question 1

Which of the following best describes codominance in genetics?

Accepted Answer

Phenotypes of both parents are expressed equally and simultaneously in the offspring.

Question 2

In the ABO blood group system, which genotype(s) can produce a child with blood type O?

Accepted Answer

ii

Question 3

A couple, both with genotype I\^A i, have a child. What is the probability that the child will have blood type A?

Accepted Answer

$$\frac{1}{2}$$

Question 4

Which of the following is an example of incomplete dominance?

Accepted Answer

A red flower crossed with a white flower produces pink offspring.

Question 5

If two parents are both heterozygous for the I\^A and I\^B alleles (genotype I\^A I\^B), what is the probability that their child will have blood type AB?

Accepted Answer

$$\frac{1}{4}$$

Question 6

Which rule should be used to calculate the probability that two independent genetic events both occur?

Accepted Answer

Product rule

Question 7

A mother with genotype I\^A i and a father with genotype I\^B i have a child. What is the probability that the child will have blood type AB?

Accepted Answer

$$\frac{1}{4}$$

Question 8

Which of the following statements about the ABO blood group system is correct?

Accepted Answer

Blood type A individuals can have genotype I\^A I\^A or I\^A i.

Question 9

If the probability of a child inheriting allele A from one parent is $$\frac{1}{2}$$ and the probability of inheriting allele B from the other parent is $$\frac{1}{2}$$, what is the probability that the child will inherit both alleles?

Accepted Answer

$$\frac{1}{4}$$

Question 10

A couple, both with genotype I\^A i, have two children. What is the probability that one child is blood type A and the other is blood type O?

Accepted Answer

$$\frac{1}{8}$$

Question 11

Which of the following best explains why the ABO blood group system is an example of multiple alleles?

Accepted Answer

There are more than two possible alleles for the gene controlling blood type.

Question 12

If a person with genotype I\^A I\^B has children with a person of genotype ii, what are the possible blood types of their children?

Accepted Answer

A and B only

Question 13

Which of the following is true regarding the sum rule in probability?

Accepted Answer

It is used when outcomes are mutually exclusive and you want the probability of either event occurring.

Question 14

A child is blood type O. Which parental genotypes are possible?

Accepted Answer

At least one parent must carry the i allele.

Question 15

Which of the following crosses could produce offspring with all four ABO blood types?

Accepted Answer

I\^A i x I\^B i

Question 16

A person with genotype I\^A I\^B is considered to have which blood type?

Accepted Answer

AB

Question 17

If two heterozygous parents (I\^A i and I\^B i) have a child, what is the probability that the child will be blood type O?

Accepted Answer

$$\frac{1}{4}$$

Question 18

Which of the following is NOT a possible genotype for blood type B?

Accepted Answer

I\^A I\^B

Question 19

A person with genotype ii marries a person with genotype I\^A I\^B. What is the probability that their child will have blood type A?

Accepted Answer

$$\frac{1}{2}$$

Question 20

Which of the following best describes the relationship between I\^A and I\^B alleles in the ABO blood group system?

Accepted Answer

I\^A and I\^B are codominant to each other.

Week 5 Multiple Alleles, Types of Dominance, ABO Blood Groups, and Probability Rules

Study Guide - Practice Questions

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