Genes are carried on___.
-centromeres
-chiasma
-nuclei
-centrosomes
-chromosomes
chromosomes
A(n) ___ is an example of an organism that can reproduce asexually.
-dog
-mouse
-cat
-human
-amoeba
amoeba
Which of the following is a stage of mitosis?
-interphase
-cytokinesis
-DNA replication
-telophase
-meiosis
telophase
The correct sequence of stages of mitosis is ___.
-metaphase, prophase, anaphase, telophase
-interphase, prophase, metaphase, anaphase, telophase
-telophase, prophase, interphase, anaphase, metaphase
-prophase, metaphase, anaphase, telophase
-anaphase, interphase, prophase, metaphase, telophase
prophase, metaphase, anaphase, telophase
During metaphase ____.
-the nuclear envelope breaks up
-chromosomes line up on the midline of the cell
-centromeres divide
-cytokinesis occurs
-tetrads form
chromosomes line up on the midline of the cell
Which of these events occurs during anaphase?
-chromosomes align on the midline of the cell
-tetrads form
-nucleoli reappear
-cytokinesis occurs
-centromeres divide
centromeres divide
During telophase___.
-tetrads form
-the events of prophase are reversed
-the genetic material doubles
-chromosomes line up on the midline of the cell
-sister chromatids separate
the events of prophase are reversed
A cell that completed the cell cycle without undergoing cytokinesis would ___.
-not have completed anaphase
-be a prokaryotic cell
-be diploid
-have two nuclei
-be haploid
have two nuclei
Which of the following will help prevent cancer and increase survival?
-eat a low-fiber, low-fat diet
-smoke only cigarettes
-overexpose skin to the sun
-seek early detection
-limit exercise
seek early detection
The chromosomes of eukaryotic cells are found in the __.
-basal body
-Golgi apparatus
-centriole
-nucleolus
-nucleus
nucleus
Chromatin consists of___.
-DNA and protein
-RNA and protein
-DNA only
-protein only
-RNA only
DNA and protein
Nucleosomes are made of ___.
-DNA and nonhistone proteins
-DNA wrapped around histone proteins
-DNA and RNA polymerase
-RNA and protein
-intertwined RNA and DNA
DNA wrapped around histone proteins
A duplicated chromosome consists of two ___.
-centrosomes
-genes
-centromeres
-genomes
-chromatids
genes
Sister chromatids are joined at the __.
-centromere
-spindle
-centriole
-centrosome
-chromatin
centromere
Which of the following occurs during interphase?
-chromatin becomes tightly coiled
-the mitotic spindle forms
-sister chromatids separate
-DNA is synthesized
-cytokinesis occurs
DNA is synthesized
The cell cycle results in the production of ___.
-two diploid cells, each with the same amount of genetic material but with different genetic information
-four haploid cells, each with the same amount of genetic material but with different genetic information
-a diploid zygote
-two diploid cells, each with the same amount of genetic material and the same genetic information
-four diploid cells, each with the same amount of genetic material and the same genetic information
two diploid cells, each with the same amount of genetic material and the same genetic information
Which of the following occurs during prophase?
-chromsomes line up on the midline of the cell
-sister chromatids separate
-cytokinesis occurs
-nucleoli reappear
-the mitotic spindle begins to form
the mitotic spindle begins to form
A karyotype (a chromosome display) would be unable to determine ___.
-down syndrome
-polyploidy
-turner syndrome
-sex
-eye color
eye color
How much genetic material is present in a cell during prophase 1 compared to a cell that has completed meiosis II
-the same amount
-1/4 as much
-1/2 as much
-twice as much
-4x as much
4x as much
During prophase 1, the pairing of homologous chromsomes results in the formation of a ___.
-chromatid
-zygote
-cell plate
-tetrad
-centrosome
tetrad
During metaphase 1, ___
-tetrads form and crossing over occurs
-sister chromatids separate and migrate to opposite poles
-centrosomes migrate to opposite poles
-tetrads line up on the midline of the cell
-the nuclear envelope breaks up
tetrads line up on the midline of the cell
Upon completion of telophase 1 and cytokinesis, there is (are) __ cells.
-4 diploid
-2 diploid
-1 diploid
-4 haploid
-2 haploid
2 haploid
Anaphase II is essential the same as mitotic anaphase except that in anaphase II ___ and in mitotic anaphase___.
-tetrads do not form… tetrads form
-the cells are diploid… the cells are haploid
-the cells are haploid and sister chromatids separate… the cells are diploid and homologous pairs separate
-chromsomes line up double file on the midline of the cell…chromosomes line up single file on the midline of the cell
-crossing over occurs…crossing over does not occur
the cells are haploid and sister chromatids separate… the cells are diploid and homologous pairs separate
For a species with four pairs of chromosomes, __ gametic combinations are possible
-8
-2
-20
-4
-16
16
Crossing over during prophase I results in __
-duplication
-nondisjunction
-genetic recombination
-translocation
-reciprocal translocation
genetic recombination
What is the genetic complement of an individual with Turner Syndrome?
– 2n-1
– n+1
– n-1
– 2n+1
– 4n
2n-1
READING
C
READING
E
The genetic material is duplicated during ___ of the cell cycle.
-the mitotic phase
-G1
-G2
-mitosis
-the S phase
the S phase
Asexual reproduction requires ___ individuals
-2
-4
-1
-3
-0
1
Both mitosis and meiosis are preceded by __.
-interphase
-metaphase
-prophase
-telophase
-anaphase
interphase
With one exception of all of the following are characteristics of meiosis. Which is the one exception?
-pairing of homologous chromosomes
-crossing over
-random fertilization
-the production of gametes
-independent orientation of chromosomes
random fertilization
Homologous chromosomes ___.
-separate during interphase
-are a set of chromosomes that the cell received from one parent
-were formed when they separated during anaphase
-do not include the sex chromosomes
-carry the same gene sequence
carry the same gene sequence
What is the sex chromosome complement of a normal human male?
-XX
-YO
-XXY
-XO
-XY
XY
How many autosomes do humans have?
-23
-46
-22
-2
-44
44
Chromosomes that do not determine the sex of an individual are called__.
-sister chromatids
-autosomes
-polysomes
-centromeres
-transposons
autosomes
Sexual intercourse in humans ___.
-produces an individual with 23 chromosomes
-prevents genetic disorders
-combines two diploid gametes, producing a zygote
-produces a haploid individual
-allows a haploid sperm cell to fertilize a haploid egg cell
allows a haploid sperm cell to fertilize a haploid egg cell
How does prophase 1 differ from prophase II?
-during prophase 1 the nuclear envelope breaks up; during prophase II the nuclear envelope remains intact
-tetrads do not form during prophase 1; tetrads form during prophase II
-during prophase 1 chromatin condenses; chromatin does not condense during prophase II
-during prophase 1 there is one diploid cell; during prophase II there are two haploid cells
-during prophase 1 chromosomes line up single file on the midline of the cell; during prophase II the chromosomes line up in double file on the midline of the cell
during prophase 1 chromosomes line up single file on the midline of the cell; during prophase II the chromosomes line up in double file on the midline of the cell
x

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