Download Genetics Quiz

Genetics Quiz
Multiple Choice - Identify the choice that best completes the statement or answers the question.
____
1. An error in the production of contractile proteins will most likely affect
a. cell energy use.
d. waste management.
b. cell movement.
e. none of the above.
c. excretion of materials.
____
2. Vesicles are formed during
a. protein synthesis.
b. endocytosis.
c. cellular respiration.
d. photosynthesis.
e. cell division.
____
3. What is the correct sequence of the following events that occur in mitosis?
1. The cytoplasm and organelles are divided between the daughter cells.
2. The nucleolus and nuclear envelope reappear.
3. The centromere splits.
4. The chromosomes condense and the nucleolus disappears.
5. The chromosomes are pulled to the poles of the cell.
6. The chromosomes line up on the equatorial plane.
a. 2, 1, 3, 6, 5, 4
d. 4, 6, 3, 5, 2, 1
b. 1, 4, 3, 5, 6, 2
e. 4, 6, 3, 2, 5, 1
c. 4, 3, 6, 5, 1, 2
____
4. If the centromere in one of your 46 chromosomes does not split until telophase, it would result in
a. two cells, each with 46 chromosomes.
b. two cells, each with 23 chromosomes.
c. two cells, one with 45 chromosomes and one with 47 chromosomes.
d. two cells, one with 23 chromosomes and one with 46 chromosomes.
e. two cells, one with 40 and chromosomes and one with 52 chromosomes.
____
5. An important feature of meiosis is that it
a. results in the production of a fertilized egg cell.
b. minimizes the number of genetically different gametes.
c. doubles the chromosome number between successive generations.
d. maintains the same number of chromosomes in the organism between generations.
e. reduces the number of chromosomes in the organism between generations.
____
6. Which is a result of meiosis?
a. Chromosome number is reduced to one-half the original number.
b. New combinations of genes are produced when crossing over occurs.
c. Maternal and paternal chromosomes are mixed when homologous chromosomes separate
independently.
d. Genetic variation is maintained within species.
e. All of these choices are results of meiosis.
____
7. Classify the following statement: The chromosomes are replicated in interphase.
a. mitosis
d. neither mitosis nor meiosis
b. meiosis
e. both mitosis and meiosis
c. fertilization
____
8. Classify the following statement: The daughter cells have the same number of chromosomes as the parent
cell.
a. mitosis
d. neither mitosis nor meiosis
b. meiosis
e. both mitosis and meiosis
c. fertilization
____
9. The genetic defect known as Down Syndrome is due to
a. an extra chromosome.
d. a missing sex chromosome.
b. a nonfunctional enzyme.
e. two female sex chromosome
c. linkage and crossing over.
____ 10. How many chromosomes would occur in each body cell of a person who has combined Down/Klinefelter
syndrome?
a. 23
d. 47
b. 45
e. 48
c. 46
____ 11. Down Syndrome
a. occurs only in females.
b. occurs in males and females equally.
c. is a result of an extra chromosome.
d. is caused by a missing chromosome.
e. occurs only in males.
____ 12. A gene exists in two different forms (A and a). With respect to the allele present, which type of gamete can a
homozygous recessive individual produce?
a. a
d. A and a
b. A
e. AA
c. Aa
____ 13. Although there are many genes that modify the expression of eye colour in humans, in general, dark eye
colour is dominant to blue eye colour. Freckles are also dominant to no freckles. These genes are located on
different chromosomes. If one parent is blue-eyed with no freckles and the other is heterozygous for dark eye
colour and freckles, which ratio of phenotypes may be seen in the offspring?
a. 1 dark eye–freckles: 1 blue eye–freckles
b. 1 dark eye–freckles: 1 blue eye–freckles: 1 dark eye–no freckles
c. 1 dark eye–freckles: 1 dark eye–no freckles: 1 blue eye-freckles: 1 blue eye–no freckles
d. 9 dark eye–freckles: 3 dark eye–no freckles: 3 blue eye–freckles: 1 blue eye–no freckles
e. 3 dark eye–freckles: 1 dark eye–no freckles: 3 blue eye–freckles: 9 blue eye–no freckles
____ 14. The cross that would yield some organisms homozygous recessive for both genes is
a. TTrr  TTrr.
d. TTRr  ttRr.
b. TtRr  ttRR.
e. TtRr  ttRr.
c. ttRR  TTr.
____ 15. If K and R both produce purple colour, how many chances in 16 will there be for purple offspring to occur in
the cross KkRr  KkRr?
a. 3
d. 15
b. 9
e. 16
c. 12
Matching
Match the process of cell division to the following events.
a. mitosis
b. meiosis
____ 16. daughter cells are genetically identical to each other and parent cell
____ 17. results in two daughter cells
____ 18. cells are haploid
____ 19. introduces genetic variation into a species
____ 20. daughter cells are different from each other and parent cell
____ 21. cells are diploid
____ 22. results in four cells
____ 23. involves two divisions
____ 24. involved in the production of sex cells
____ 25. involves one division
Short Answer
26. What does the cell theory state?
27. Explain why homologous chromosomes are paired.
28. How did Mendel determine that the allele for a yellow seed is dominant over the allele
for a green seed?
Genetics Quiz
Answer Section
MULTIPLE CHOICE
1. ANS: B
2. ANS: B
3. ANS: D
4. ANS: C
5. ANS: D
6. ANS: E
7. ANS: E
8. ANS: A
9. ANS: A
10. ANS: E
11. ANS: C
12. ANS: A
13. ANS: C
14. ANS: E
15. ANS: D
MATCHING
16. ANS: A
17. ANS: A
18. ANS: B
19. ANS: B
20. ANS: B
21. ANS: A
22. ANS: B
23. ANS: B
24. ANS: B
25. ANS: A
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
K/U
K/U
K/U
I
K/U
K/U
K/U
K/U
K/U
I
K/U
I
I
I
I
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
1.2
1.3
3.2
3.2
3.6
3.6
3.7
3.7
3.9
3.9
3.9
4.2
4.6
4.6
4.6
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
1
1
1
1
1
1
1
1
1
1
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
K/U
K/U
K/U
K/U
K/U
K/U
K/U
K/U
K/U
K/U
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
SHORT ANSWER
26. ANS:
1. All living things are made up of one or more cells (and their products).
2. The cell is the smallest entity that retains the properties of life.
3. New cells arise only from cells that already exist.
Note: this is the text wording; any similar ideas should be accepted.
27. ANS:
Homologous chromosomes are paired chromosomes because they are similar is shape, size, and gene
arrangement.
28. ANS:
Mendel considered the traits that were expressed most often as dominant, and those that were expressed less
frequently were considered recessive.