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 Posted: Tue Mar 04, 2008 1:43 pm
explain what will happen to a cell during mitosis?
what is the difference btwn asexual reproduction and sexual reproduction?
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Posted: Tue Mar 04, 2008 2:07 pm
BIOLOGY! YES! I LOVED THIS STUFF!!!!
Okay. There are seven phases of mitosis.
Interphase: This is the longest period of the complete cell cycle during which DNA replicates, the centrioles divide, and proteins are actively produced.
Prophase: the nucleolus fades and chromatin condenses into chromosomes. Microtubules disassemble to make the mitotic spindle.
Prometaphase: the nuclear envelope breaks down so there is no longer a recognizable nucleus.
Metaphase: Tension applied by the spindle fibers aligns all chromosomes in one plane at the center of the cell.
Anaphase: Spindle fibers shorten, the kinetochores separate, and the chromatids are pulled apart and begin moving to the cell poles.
Telophase: The daughter chromosomes arrive at the poles and the spindle fibers that have pulled them apart disappear.
Cytokinesis: The spindle fibers not attached to chromosomes begin breaking down.
And returns to Interphase.
=D
Asexual Reproduction :: Only one parent :: Identical to Parent :: Usually in single organisms. Some plants use this (ex. strawberry plants).
Sexual Reproduction :: Two parents :: 50% of characteristics from each parent :: Usually in plants and animals and most multicellular organisms.
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Posted: Tue Mar 04, 2008 2:43 pm
Lady, your smarts are showing. wink
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Posted: Tue Mar 04, 2008 3:09 pm
*hugs*
thank you lady!
my you said it in WAYYY simpler terms than my science book. biggrin
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