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Multiple Choice Quiz
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Choose the best answer.



1

Fertilization results in
A)a zygote.
B)a diploid cell.
C)a cell with a new genetic combination.
D)All of these are correct.
2

The diploid number of chromosomes in humans is 46. The haploid number is
A)138.
B)92.
C)46.
D)23.
3

After chromosome replication and during synapsis,
A)homologous chromosomes pair along their lengths.
B)sister chromatids pair at the centromeres.
C)homologous chromosomes pair at their ends.
D)sister chromatids pair along their lengths.
4

During which stage of meiosis does crossing over occur?
A)prophase I
B)anaphase I
C)prophase II
D)telophase II
5

Synapsis is the process whereby
A)homologous pairs of chromosomes separate and migrate toward a pole.
B)homologous chromosomes exchange chromosomal material.
C)homologous chromosomes become closely associated.
D)the daughter cells contain half of the genetic material of the parent cell.
6

Terminal chiasmata are seen during which phase of meiosis?
A)anaphase I
B)prophase I
C)metaphase I
D)metaphase II
7

Which of the following occurs during anaphase I?
A)Chromosomes cluster at the two poles of the cell.
B)Crossing over occurs.
C)Chromosomes align down the center of the cell.
D)One version of each chromosome moves toward a pole.
8

Mitosis results in two ________ cells, while meiosis results in _______ haploid cells.
A)haploid/four
B)diploid/two
C)diploid/four
D)haploid/two
9

Genetic diversity is greatest in
A)parthenogenesis.
B)sexual reproduction.
C)asexual reproduction.
D)binary fission.
10

Which of the following is not a hypothesis about the evolution of sex?
A)It evolved to repair damaged DNA.
B)It evolved as a way to eliminate individuals.
C)It evolved as a way to eliminate mutations.
D)It evolved as a way to "store" recessive alleles that may prove beneficial in the future.







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