Cell Division Everything you need to know- but were afraid to ask…
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Transcript of Cell Division Everything you need to know- but were afraid to ask…
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Cell Division
Everything you need to know- but were afraid to ask…
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Can asexual reproduction produce a large number of offspring?
Yes, that is why you get sick so fast! Bacteria can reproduce every 30 minutes!
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Give me an example of regeneration.
A star fish grows its arm back
A leaf breaks off a plant, someone puts the stem into water and roots eventually grow from the stem (cutting).
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What does asexual reproduction in most organisms involve?
Mitosis by one parent!
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As compared to the parent cell, after mitosis, the number of chromosomes in a daughter cells is…
The same as the number in the parent cell
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Why do most multicellular organisms grow and develop?
Because their cells continue to divide.
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What are the steps of the cell cycle?
Interphase, mitosis and cytokinesis
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When do cells prepare for cell division?
interphase
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Name the stages of mitosis?
Prophase
Metaphase
Anaphase
Telophase
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What happens during prophase?
Chromosomes condense, each of which consists of two identical chromatids held together by a centromere.
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What happens during metaphase?
The chromosomes line up in the middle of the cell.
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What happens during anaphase?
Chromatids split and the chromosomes are pulled to opposite ends of the cell.
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What happens during telophase?
The chromosomes uncondense and new nuclear membranes form.
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What are the two parts of a chromosome?
Centromere and chromatids
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What are the names of the two scienctists who built a model of DNA in 1953?
Watson and Crick
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What does a cell’s genetic material contain?
instructions for growth and function
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What is the shape of DNA?
double helix
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How is DNA condensed?
It is wrapped around proteins like a spool.
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Why is cell division important?
It is essntial for growth, development, and repair.
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What makes one organism larger than another?
The larger organism has more cells
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What happens during an organism’s development?
Cells become specialized
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What is the part of a cell’s life when it is not dividing?
interphase
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What is the part of a cell cycle when the nucleus divides?
mitosis
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What do you call the division of the parent cell’s cytoplasm?
cytokinesis
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What structure in a plant cell grows between the two new nuclei after mitosis?
the cell plate
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What kind of asexual reproduction do most single-celled organisms use?
binary fission
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How do some multi-celled organisms reproduce asexually? (like sponge bob)
by budding
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What process do starfish use to replace broken body parts?
regeneration
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How do plants use regeneration?
by growing from cuttings
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Is the generation time of bacteria long or short?
short
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What is your favorite class?
It better be science!