Exam Review:
Exam III (chap 12-14,25-27)
Supplemental Instruction
Iowa State University
Leader: Julie
Course: Biology 211
Instructor: Dr. Holscher
Date:
1. The sexual life cycle alternates between fertilization and what?
a. Mitosis
b. Meiosis
c. Zygote
d. Somatic cell
2. How many possible daughter cell combinations are there for an organism with a diploid
number of 8?
a. 4
b. 12
c. 16
3. Two alleles that both affect the phenotype in separate distinguishable ways is known as?
a. Complete dominance
b. Codominance
c. Incomplete dominance
d. Partial dominance
4. This occurs when a few individuals become isolated from a larger population,
establishing a new population whose gene pool differs from the original population?
a. Bottleneck effect
b. Founder effect
c. Julie effect
d. Translocation
5. When are homologues separated?
a. Meiosis I
b. Meiosis II
c. Meiosis III
d. Meiosis IV
6. Which phase is not part of Interphase?
a. G0 leaves the cell cycle
b. S
c. G1
d. G2
7. What term refers to all chromosomes other than the sex chromosomes?
a. Gametes
b. Body Cell
c. Barr Body
d. Autosome
8. Which type of spindle microtubule controls movement of the chromosome?
a. Astral
b. Polar
c. Kinetochore
d. Anchoring
Supplemental Instruction
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9. Genes for each character exist in two variant forms, called ________.
a. Alleles
b. Chromosomes
c. Spots
d. Genotype
10. Who hypothesized that species evolve through use and disuse and through the inheritance
of acquired traits.
a. Charles Darwin
b. Carolus Linnaeus
c. Jean-Baptiste de Lamark
d. Alfred Wallace
11. When are sister chromatids separated?
a. Meiosis I
b. Meiosis II
c. Meiosis III
d. Meiosis IV
12. How many pairs of autosomes are in a human muscle cell?
a. 23
b. 22
c. 44
d. 46
13. What stage is missing during meiosis II?
a. Metaphase
b. Prophase
c. Interphase
d. Telophase
14. Genetic drift as a major impact on ________.
a. Small populations
b. Large population
15. A testcross can determine the _________ of an organism that has a _________
phenotype.
a. Phenotype, recessive
b. Genotype, dominant
c. Phenotype, dominant
d. Genotype, recessive
16. What event produces recombinant chromosomes?
a. Formation of a tetrad
b. Independent assortment of chromosomes
c. Crossing Over
d. Random Fertilization
17. The normal character phenotype is referred to as what?
a. Dominant type
b. Recessive type
c. Wild type
d. Normal Type
18. Fathers pass sex-linked alleles to all of their ________, but to none of their ________.
a. Sons, daughters
b. Daughters, sons
19. Which person(s) advocated Unifromitarianism?
a. John Ray
b. Carolus Linnaeus
c. Jean-Baptiste de Lamark
d. James Hutton/Charles Lyell
20. Prevents the interspecies hybrid zygote from developing into a viable, fertile offspring.
a. Prezygotic isolating mechanism
b. Postzygotic isolating mechanism
21. The apparatus of microtubules originate from what structure?
a. Centromere
b. Nucleus membrane
c. Centrosome
d. Polar astrals
22. Homologous chromosomes do not share which quality?
a. Same length
b. Same staining pattern
c. Same RNA double helix
d. Same centromere position
23. Meiosis results in the formation of how many daughter cells?
a. 2
b. 3
c. 4
d. 8
24. What is the smallest unit that can evolve?
a. Individual
b. Population
c. Species
25. The Hardy-Weinberg equation is represented by:
a. q^3 +2pq + q^3=1
b. q^2 +pq^2 +q^2=1
c. q^2 +2pq+ q^2=1
d. p^2+2pq+q^2=1
26. Migration tends to ________ difference in allele frequency between population while
______ genetic diversity within population.
a. Decrease, increase
b. Increase, decrease
27. Anueploidy may result from __________ during either Meiosis I or II.
a. Crossing Over
b. Nondisjunction
c. Inversion
d. Translocation
28. Variation in the number of sets of chromosomes is called?
a. Anueploidy
b. Polyploidy
c. Nondisjunction
d. Translocation
29. All mouse cells are diploid
a. True
b. False
30. How many autosomes are in a human brain cell?
a. 22
b. 44
c. 46
d. 88
31. A variation in the number of a particular chromosome within a set is called?
a. Anueploidy
b. Polyploidy
c. Nondisjunction
d. Translocation
32. In a particular animal species, a long tail (T) is dominant to a short tail (t), and a blonde
hair (B) is dominant to grey hair (b). When a TtBb female is mated with a ttbb male, the
observed distribution of offspring is as follows 411 offspring with a long tail and blonde
hair, 101 offspring with a long tail and grey hair, 312 offspring with a short tail and
blonde hair, and 386 offspring with a short tail and grey hair. Based on these offspring,
what is the approximate recombination frequency?
a. 24%
b. 34%
c. 64%
d. 84%
33. A hypothesis that had been tested and is well supported by data is known as?
a. Scientific theory
b. A fact
c. Idea
d. Postulate
34. Which sex determines the gender of the offspring?
a. Male
b. Female
35. The phenotype of F1 hybrids is somewhere between the phenotype of the two parental
varieties is called?
a. Complete dominance
b. Codominance
c. Incomplete dominance
d. Partial dominance
36. All of the alleles for every gene in a given population is called a ______?
a. Species
b. Gene Pool
c. Locus
d. Hybrid Zone
37. What phase of the cell cycles do sister chromatids form?
a. G1
b. G2
c. S
d. Prophase
38. Which person viewed life as descent with modification?
a. Charles Darwin
b. Carolus Linnaeus
c. Georges Cuvier
d. Alfred Wallace
39. What is the difference between allopatric and sympatric speciation?
a. One involves animals, one involves plants
b. Allopatric is geographic isolation, sympatric is reproductive isolation
c. Allopatric is reproductive isolation, sympatric is geographic isolation
d. They are both the same because they are both speciation
40. What is the difference between prezygotic and postzygotic isolating mechanisms?
a. Prevent mating vs prevent viable, fertile offspring
b. One increases reproductive chance the other does not.
c. There is no such thing as prezygotic, only postzygotic
d. There is no such thing as postzygotic, only prezygotic
41. When a single gene influences many traits it is said to be
a. Autosomal
b. Multipropic
c. Pleioptriopic
d. Codominant
42. What is a loci?
a. A sequence in a gene
b. What the genetic information wraps around
c. A trait for a specific character
d. The location of a gene on a specific chromosome
43. What term did Charles Darwin not use in his work: “The Origin of Species”
a. Natural selection
b. Evolution
c. Populations
d. Decent with modification
44. Which event is not unique to meiosis?
a. Formation of a bivalent through synapsis
b. Replication of chromosomes
c. Crossing over of nonsister chromatids through a chiasma.
45. A mammalian cell entering the M phase of the cell cycle contains 32 chromosomes. How
many chromatids does it contain?
a. 32
b. 64
c. 96
d. 128
46. If a particular trait affects males more than females the trait is probably
a. A y-linked trait
b. A dominant trait
c. A sex-linked trait
d. An imprinted trait
47. Mature cells such as nerve cells and muscle cells are permanently in the ____ phase
a. G0
b. G1
c. G2
d. G3
48. In a cell that 2n = 10, how many possible combinations of daughter cells can there be due
to meiosis?
a. 4
b. 16
c. 32
d. 64
49. If you got a cut, what process would your body most likely use to repair itself?
a. Mitosis
b. Meiosis
c. Granulation
d. Synthesis
50. Independent assortment of genes has to do with
a. Crossing over
b. Random fertilization
c. Random way that homologous chromosomes line up during meiosis
d. X-linked traits