11751526
Descripción
Test por Christina Marshall, actualizado hace más de 1 año
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Creado por Christina Marshall
hace casi 7 años
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Pregunta 1
Pregunta
In which phase of the cell cycle are chromosomes replicated?
Respuesta
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G1 Phase
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S Phase
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M phase
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G2 Phase
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none of the above
Pregunta 2
Pregunta
If two chromosomes are homologous, they
Respuesta
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look similar under the microscope
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have very similar DNA sequences
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carry the same types of genes
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may carry different versions of the same gene
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are all of the above
Pregunta 3
Pregunta
Checkpoints during the cell cycle are important because they
Respuesta
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allow the organelle activity to catch up to cellular demands
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ensure the integrity of the cell's DNA
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allow the cell to generate sufficient ATP for cellular division
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are the only time DNA replication can occur
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do all of the above
Pregunta 4
Pregunta
Which of the following is a reason for mitotic cell division?
Respuesta
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asexual reproduction
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gamete formation in animals
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multicellularity
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all of the above
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both a and c
Pregunta 5
Pregunta
A replicated chromosome is composed of
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two homologous chromosomes held together at the centromere.
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four sister chromatids held together at the centromere.
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two sister chromatids held together at the centromere
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four homologous chromosomes held together at the centromere.
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one chromosome with a centromere.
Pregunta 6
Pregunta
Which of the following is not an event of anaphase of mitosis?
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The nuclear envelope breaks apart
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Sister chromatids separate
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Kinetochore microtubules shorten, pulling the chromosomes to the poles.
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Polar microtubules push against each other, moving the poles father apart.
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All of the above occur during anaphase.
Pregunta 7
Pregunta
A student is looking at cells under the microscope. The cells are from an organism that has a diploid number of 14. In one particular case, the cell has seven replicated chromosomes (sister chromatids) aligned at the metaphase plate of the cell. Which of the following statements accurately describes the particular cell?
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The cell is in metaphase of mitosis.
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The cell is in metaphase of meiosis I.
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The cell is in metaphase of meiosis II.
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All of the above are correct.
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Both b and c are correct.
Pregunta 8
Pregunta
Which of the following statements accurately describes a difference between mitosis and meiosis?
Respuesta
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Mitosis may produce diploid cells, where as meiosis produces haploid cells.
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Homologous chromosomes synapse during meiosis but do not synapse during mitosis.
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Crossing over commonly occurs during meiosis, but it does not commonly occur during mitosis.
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All of the above are correct
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Both a and c are correct.
Pregunta 9
Pregunta
During crossing over in meiosis I,
Respuesta
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homologous chromosomes are not altered.
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homologous chromosomes exchange genetic material.
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chromosomal damage occurs
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genetic information is lost
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cytokinesis occurs
Pregunta 10
Pregunta
Aneuploidy may be the result of
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Duplication of a region of a chromosome
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Inversion of a region of a chromosome
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nondisjunction during meiosis
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interspecies breeding
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all of the above
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