1. How is independent assortment beneficial to a population? a. it prevents the expression of harmful traits?

Question

b. it limits the number of mutations that occur on a chromosome
c. it greatly reduces the number of different genetic combinations in the gametes
d. all possible combination of gametes have an equal chance of being produced

2. Mendel's classic dihybrid phenotypic ratio 9:3:3:1 would be expected when
a. both parents are homozygous dominant for both traits
b. one parent is heterozygous for both traits and the other parent is homozygous dominant for one trait and heterozygous for the other trait
c. both parents are heterozygous for both traits
d. both parents come from a highly inbred pedigree

3. If you observed a population of a particular organism and noticed 3 distinct phenotypes – such as tall, medium and short, what is most likely causing this?
a. tall alleles are likely incompletely dominant to recessive alleles
b. the recessive alleles are starting to mutate
c. tall allele are codominant to short alleles
d. there is no way to tell from the information provided

5.Which of these is a difference between males and females as they make cells by meiosis?
a. female cells have more genetic variation than male cells
b. males produce more functional cells per division, but the female makes a larger cell
c. males produce cells that are 2n (diploid), females produce cells that are n(haploid)
d. all of the above are true

6.In meiosis in females, what is the importance of the formation of polar bodies?
a. they can be fertilized in the event that the ovum dies
b. they contribute new chromosomes to the ovum
c. they don't get much cytoplasm but they do take chromosomes, allowing the ovum to have a reduced number of chromosomes
d. they increase the genetic variation in a population by giving the sperm cells a variety of cells that could be potentially fertilized

7.The term alleles describes
a. a type of chromosome
b. the various forms of a particular gene
c. the number of recessive traits an organism has
d. the pedigree of an individual

4. A woman has type A blood and her mother had type O. The woman's husband has type B blood. His mother had type A. What would be the possible blood types of children of this couple?
a. A or B, nothing else
b. A, B, AB, or O
c. A, B, or AB
d. no way to determine based on the information given

8. Which statement describes epistasis?
a. it is when mitosis is terminated
b. it is when an organism shows both the dominant and recessive forms of an allele
c. it is when one gene influences the behavior of another
d. it is a feedback mechanism to limit protein production in a cell

9. How does gene interaction influence observed characteristics?
a. it supports the idea that each body structure is the result of the action of one gene
b. it increases the percent of recessive phenotypes in a population
c. it shows that several genes can contribute to the expression of a particular phenotype
d. it shows the effects of independent assortment in a pedigree analysis

10. A man with normal color vision has a daughter with a woman who also has normal color vision. He becomes very upset when he discovers that his daughter is red-green colorblind. Your initial thoughts on this are:

a. "Its not a big deal, the parents' ability to detect color has nothing to do with the daughter's ability to do so."
b. "Its not a big deal, as long as the mother is carrying one allele for colorblindness, they could have produced this child even if he isn't colorblind."
c. "I don't blame him, since he obviously isn't the father of this girl."
d. "This guy needs to take a genetics course. Since colorblindness is on the Y chromosome, he gave her the gene and has nothing to be upset about."

Answer 1

1 d
2 c
3 c
5 b
6
7 b
4 b
8 b
9 c
10 c
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