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16 Cards in this Set
- Front
- Back
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How many pairs of chromosomes does the original cell contain?
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18
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How many chromosomes will each of the daughter cells formed by mitosis (and cytokinesis) contain?
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36 total chromosomes (18 pars)
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how many chromosomes will each of the daughter nuclei resulting from Meiosis 1 only (that is, in Telophase 1) Contain?
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18 total chromosomes (no pairs)
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What happens in Metaphase 1?
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Chromosomes line up on the equator in pairs.
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If a cell contains n quantity of DNA prior to chromosom replication, how much DNA will each of the daughter cells contain when meiosis(and cytokinesis) is complete?
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1/2n
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what is interesting about the life cycle of bdelloid rotifers such as those in the gens Philodina?
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They have reproduced asexually, exclusively, for millions of year.
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in a strict botanical sense, what are fruits?
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ripened ovaries, which used to be parts of flowers, but which now contain seeds.
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what is an advantage offered by reproducing sexually?
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it creates th possibility tht advantagoues genes from one individual will be combined with different, advatagoues genes from antoher individual.
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cell at interphase
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A diploid cell duplicates its DNA and prepares for mitosis.
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early prophase
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Mitosis begins. DNA and its associated proteins have started to condense. two chromosomes were inherited from the female parent.
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late prophase
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The duplicated chromosomes continue to condense. new microtubules move one of two pairs of centrioles to the opposite side of the nucleus. The nuclear envolope starts to break up.
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transition to metaphase
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Microtubules penetrate the nuclear regio and collectively form a bipolar spindle.
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metaphase
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all of the chromosomes have become lined up midway between the spindle poles. The chromosomes are in their most tightly condensed form.
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anaphase
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sister chromatids separate as motor proteins moving along spindle micotubules drag them to opposite spindle poles. Other microtubules push the poles farther apart.
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telophase
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there are two clusters of chromosomes,which now decondense. Patches of new membrane fuse to form a new nuclear envelope. Mitosis is over.
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two daughter cells at interphase
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after cytoplasmic division, there are two daughte cells. Each is diploid.
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