The interphase stage in the eukaryotic cell cycle has the subgroups:
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Gap 1, S phase, and Gap 2.
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The Gap 1, S (DNA synthesis), and Gap 2 phases of the cell cycle are collectively called:
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interphase.
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DNA replication occurs during the _____________ phase of the cell cycle.
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S (DNA synthesis)
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Within interphase, which of the stages is defined by the active replication of the cell's genetic material?
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the S (DNA synthesis) phase
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The eukaryotic cell cycle consists of four phases, in the following order:
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mitosis, Gap 1, S (DNA synthesis), and Gap 2.
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In DNA replication, when the DNA molecule separates into two strands:
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it is possible to reconstruct perfectly all the information on the missing strand because one strand carries all the information needed to construct its complementary strand and the rebuilding process begins, in which an enzyme connects the appropriate complementary base to the exposed base.
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The planned process of cell suicide is called:
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apoptosis.
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In order for a eukaryotic cell to undergo reproduction and divide, certain steps must be successfully completed. Select the choice below that is NOT one of these necessary steps.
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Proper reshuffling of the genetic material must occur in order to provide diversity within the gametes.
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Cancer cells are different from other cells in that they have lost their "contact inhibition." "Contact inhibition" means:
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most cells stop dividing when they bump up against other cells or collections of cells.
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During meiosis but NOT during mitosis
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genetic variation among the daughter cells is increased.
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The egg cells of a horse contain 32 chromosomes. How many chromosomes are in the horse's liver cells?
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64
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In female gamete development in humans and other vertebrates, the net result of meiosis is the production of one large egg and three small cells with very little cytoplasm. These three small cells:
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degrade almost immediately.
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Chromosomes on which recombination takes place:
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have a mixtures of maternal and paternal chromosomes and are created during meiosis.
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Crossing-over is the mixing of chromosomes, which results in the recombination of genes on the same chromosome. Which of the following correctly describes the process of crossing-over?
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Two chromatids (one maternal and one paternal) break off at corresponding points on homologous chromosomes. The pieces of chromatid rejoin to the chromosome in each other's places.
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Bacteria reproduce asexually, whereas most plants and animals reproduce sexually. Which is the better method?
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Neither method is better—each is effective in different environments for different kinds of organisms.
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Trisomy 21 is a consequence of _______________________, the unequal distribution of chromosomes during meiosis.
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non-disjunction
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