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1
During interphase, cells
A)divide.
B)stop all metabolic activity.
C)grow in size.
D)contain half the number of chromosomes of normal body cells.
2
Mitosis consists of
A)two phases.
B)four phases.
C)eight phases.
D)growth in cell size.
3
During prophase,
A)chromosomes become visible in the nucleus.
B)chromatids move to the cell's equator.
C)the centromere splits apart.
D)chromatids are at opposite poles within the cell.
4
Centrioles
A)hold sister chromatids together.
B)move to opposite poles of a cell during mitosis.
C)contain the cell's DNA.
D)are organelles located near the cell nucleus.
5
DNA is replicated
A)during metaphase.
B)during cytokinesis.
C)during interphase.
D)during anaphase.
6
Meiosis
A)occurs in all cells.
B)doubles the chromosome number in a cell.
C)produces zygote cells.
D)occurs only in cells in the reproductive organs.
7
Haploid cells
A)have twice the number of chromosomes found in other body cells.
B)have half the number of chromosomes found in other body cells.
C)are produced by mitosis.
D)are produced at fertilization.
8
Alleles are
A)identical genes.
B)altered from one generation to the next.
C)found only in reproductive cells.
D)alternative forms of a particular gene.
9
The probability that parents will have two children of the same sex is
A)1/2.
B)1/3.
C)1/4.
D)1/16.
10
A recessive allele
A)is only expressed in a homozygous form.
B)is only expressed in a heterozygous form.
C)cannot be inherited.
D)can only combine with another recessive allele.





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