Question 1
Select one answer.
10 points
Which of these discusses genotypes rather than phenotypes.
1. The offspring of these flowers can be either red or white.
2. The male mouse is homozygous dominant.
3. Lactose intolerance can be due to a missing protein (the enzyme that digests lactose).
4. All of these discuss genotypes
Question 2
Select one answer.
10 points
Alleles are different versions of a _______________.
1. phenotype
2. chromosome
3. gene
4. genotype
Question 3
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10 points
Which of the following is true of a diploid organism?
1. It has two of each gene.
2. It has two of each chromosome.
3. It has two alleles of each gene.
4. All of the above.
5. None of the above.
Question 4
Select one answer.
10 points
The sister chromatids separate during which stage of meiosis?
1. Anaphase I
2. Anaphase II
3. Prophase I
4. Prophase II
Question 5
Select one answer.
10 points
The next three questions are based on the following information.
In humans, the ability to roll the tongue (T) is dominant over the inability to do so (t). Suppose Mike, who can roll his tongue, and Jeannie, who cannot roll her tongue, have a child, Benjamin.
Part 1 of 3: If Mike’s mother was able to roll her tongue but his father was not able to roll his, then what is the probability that Benjamin will be able to roll his tongue?
1. 100%
2. 75%
3. 50%
4. 0%
Question 6
Select one answer.
10 points
Part 2 of 3: What is the probability that Benjamin will be homozygous recessive?
1. 50%
2. 0%
3. 75%
4. 100%
Question 7
Select one answer.
10 points
Part 3 of 3: What is the probability that Benjamin will be homozygous dominant?
1. 0%
2. 50%
3. 100%
4. 75%
Question 8
Select one answer.
10 points
How many different gametes are produced by a cell with the genotype AABb?
1. 1
2. 2
3. 3
4. 4
Question 9
Select one answer.
10 points
Describe the importance of independent assortment: ________________________.
1. will assort independently of each other
2. will sort to the same gamete
3. are called alleles
4. All of these are true
Question 10
Select one answer.
10 points
Homozygous is a term that can describe a(n) _____________.
1. allele
2. heterozygous
3. genotype
4. phenotype
Question 11
Select one answer.
10 points
Red flower color is incompletely dominant over white flower color. If a red flower is crossed with a pink flower, what percentage of the offspring will be pink?
1. 100%
2. 75%
3. 50%
4. 25%
Question 12
Select one answer.
10 points
Use the following information to answer the next three questions.
In humans, there are three alleles for blood type: A, B, and O. A and B are codominant over O. Suppose Jim, a man with type A blood, and Leah, a woman with type B blood, have a child, Winnie. Jim’s parents both have blood type AB. Leah’s mother has type B, and her father has type O.
Part 1 of 3: What is the probability that Winnie’s blood type will be AB?
1. 100%
2. 75%
3. 50%
4. 25%
5. 0%
Question 13
Select one answer.
10 points
Part 2 of 3:What is the chance that Winnie’s blood type will be A?
1. 100%
2. 75%
3. 50%
4. 25%
5. 0%
Question 14
Select one answer.
10 points
Part 3 of 3:What is the chance that Winnie’s blood type will be B?
1. 100%
2. 75%
3. 50%
4. 25%
5. 0%
Question 15
Select one answer.
10 points
Use the following information to answer the next three questions.
In dogs, colored fur, E, is dominant over colorless fur, e. Black fur color, B, is dominant over brown fur color, b. The E gene is epistatic to the B gene. Suppose a yellow male dog is mated with a black female. The male’s parents were both brown. The female’s mother was yellow, and her father was brown.
Part 1 of 3: What percentage of the puppies will be yellow?
1. 100%
2. 75%
3. 50%
4. 25%
5. 0%
Question 16
Select one answer.
10 points
Part 2 of 3: What percentage of the puppies will be black?
1. 100%
2. 75%
3. 50%
4. 25%
5. 0%
Question 17
Select one answer.
10 points
Part 3 of 3: What percentage of the puppies will be brown?
1. 100%
2. 75%
3. 50%
4. 25%
5. 0%
Question 18
Select one answer.
10 points
Human height is affected by ______________.
1. genetics only
2. the environment only
3. genetics and the environment
Question 19
Select one answer.
10 points
A genetic disorder that is sex-linked cannot also be ___________________.
1. autosomal
2. recessive
3. dominant
4. all of these are possible
Question 20
Select one answer.
10 points
In humans, how many alleles of genes found on the X chromosome do male have?
1. 0
2. 1
3. 2
4. 4
