mitosis vs. meiosis division of body cells and sex cells
TRANSCRIPT
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Mitosis vs. Meiosis
Division of body cells and sex cells.
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Body cells have the same number of chromosomes as the parent cells (46-46)
Sex cells have half the number of chromosomes as the parent cells (46-23)
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Asexual reproduction- requires only one parent cell
Sexual reproduction- requires two parent cells
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Parent Cell 46
Daughter Cell 46
Daughter Cell 46
Mitosis
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Meiosis Parent Cell 46
First Division
46
First Division
46
Sex Cell 23
Sex Cell 23
Sex Cell 23
Sex Cell 23
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Sexual Reproduction:Female sex cells are called eggs.Male sex cells are called sperm.
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Sex cells are known as haploids because they have half of the
genetic material. (Half from the egg and half from the sperm.)
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Females release one egg from an ovary each month. If the egg is not
fertilized, the egg will leave the body with menstruation.
Average 28 day cycle.
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Fertilization occurs with the union of the egg (23) and the sperm (23).The union creates a zygote (46 chromosomes). The zygote cell is a diploid (full number).
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Who determines the sex of the offspring?
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So…
XX- female
XY- male
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The zygote begins to grow into an embryo by the process of mitosis or body cell division.
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How do twins form?
Identical Fraternal
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Identical Twins Sonogram Fraternal Twins Sonogram
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Siamese Twins are identical twins that have not entirely separated.
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Feature: Mitosis: Meiosis:
Beginning Cell- Body Cell Body Cell
# of cells produced- 2 4
End product cell- Body Cell Sex Cell
# of chromosomes- 46 23
Type of reproduction-
Asexual Asexual