Cell Cycles Test
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| when during the cell cycle is the cell's DNA replicated | the S phase
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| gametes are produced by the process of | meiosis
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| the two main stages of cell division are called | mitosis and cytokinesis
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| normal cells stop growing when they come into contact with other cells | true
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| during normal mitotic cell division, a parent cell having four chromosomes will produce two daughter cells, each having | four chromosomes
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| cell division is represented in figure 10-1 by letter | D
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| 3 major differences between mitosis and meiosis | 1. mitosis produces body cells, meiosis produces gametes
2. resulting cells in mitosis are genetically identical and the resulting cells in meiosis are genetically unique
3. mitosis produces diploid cells, meiosis produces haploid cells
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| what is shown in figure 11-3 | crossing over
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| cancer is a disorder in which some cells have lost their ability to control their | growth rate
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| mitosis result in two cells, whereas meiosis results in one cell | false
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| a cell's chromosomes replicate during interphase | true
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| the cell cycle is the | series of events cells go through as they grow and divide
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| typically, the longest phase of the cell cycle is metaphase | false
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| cell division solves the problem of cell growth by increasing cell volume | false
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| the process by which a cell divides into two daughter cells is called | cell division
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| cancer is a disorder in which some of the body's cells lose their control over growth and division | true
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| how do cancer cells differ from normal cells | cancer cells cannot control their growth and division rates whereas regular cells grow and divide at a consistent, normal rate
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| during metaphase, each chromosome is connected to a ______ at its centromere | spindle fiber
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| proteins called ______ regulate the timing of the cell cycle in eukaryotic cells | cyclins
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| an organism's gametes have ______ the number of chromosomes found in that organism's body cells | half
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| in all forms of _______ the affected cells fail to respond to the signals that normally control the cell cycle | cancer
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| crossing over occurs during the stage of meiosis called _________ | prophase I
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| lack of control over the cell cycle is the control of all cancers | true
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| a cell splits into two daughter cells during telophase | false
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| during which phase of mitosis do the chromosomes line up along the middle of the dividing cell | metaphase
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| compared to small cells, large cells have trouble | moving needed materials in and waste products out
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| as a cell grows it | all of the above
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| when during the cell cycle are chromosomes visible | only during cell division
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| if it takes a cell one hour to undergo mitosis, about 50 minutes of the time would be spent in prophase | false
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| which of the following is a stage of mitosis | prophase
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| the first phase of mitosis is called | prophase
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| if an organism's diploid number is 12, it's haploid number is | 6
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| chromosomes form tetrads during | prophase I of meiosis
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| as a cell becomes larger, its | volume increases faster than its surface area
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| gametes have | one allele for each gene
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| unlike mitosis, meiosis results in the formation of | four genetically unique cells
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| which event occurs during interphase | the cell grows
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| which of the following happens when a cell divides | each daughter cell receives its own copy of the parent cell's DNA
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| unlike mitosis, meiosis results in the formation of | haploid cells
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| which of the following represents the phases of mitosis is the correct order | prophase, metaphase, anaphase, telophase
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| if an organism has 16 chromosomes in each of its egg cells, its diploid number is 32 | true
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| what is the role of the spindle during mitosis | it helps separate the chromosomes
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| explain what is meant by homologous chromosomes | the two sets of chromosomes found in a body cell that have the same genes on them. one of these chromosomes is from the mother and the other is from the father
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| explain the mechanisms of sex determination in humans | gametes are responsible for sex of child. if 23rd chromosome pair is xx, it will be a girl. if it is xy, it will be a boy. the y chromosome can only come from a male, so the father of the child is essentially responsible for the gender of the baby
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| what would happen if the gametes of a species had the same number of chromosomes as the body cells | when the gametes fused during fertilization, the offspring would have more chromosomes in their body cells than the parents have. the species' chromosome number would not be constant
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Created by:
lydiafaldowski