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28 Cards in this Set
- Front
- Back
This is the example of asexual reproduction where the parent cell divides into equal parts.
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Mitosis
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In mitosis, each part is usually an ______ _______.
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Exact duplicate
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In mitosis, all offspring will have the same number of ___________ as the parent cell.
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Chromosomes
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The first step of mitosis includes duplication of the ______ and __________. This is followed by division of the cell with _________ ___________.
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genes, chromosomes, identical characteristics
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What are the five phases of mitosis?
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interphase, prophase, metaphase, anaphase, and telophase
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What is an example of sexual reproduction?
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Gametogenesis
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Gametogenesis consists of the union of two ______ ______ cells, also called _________.
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sexual germ, gametes
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Gametes unite to form a new individual organism called a _______.
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Zygote
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In Gametogenesis, one gamete comes from the _______ and one from the ________.
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male (sperm), female (ovum/egg)
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What is a reduction of the number of chromosomes in the sexual germ cell?
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Meiosis
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Meiosis consists of 2 _______ _______ and 1 _________ __________.
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nuclear divisions, chromosomal division
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Before reproduction can be completed, a cell has to go through ________.
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Meiosis
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_______ is the number of chromosomes in all body cells (after fertilization).
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Diploid
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_______ is the number of chromosomes in sex cells (before fertilization).
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Haploid
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During fertilization, after the sperm strikes the egg, a _______ _______ forms which does not allow any other sperm to enter.
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chemical barrier
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In fertilization, shortly after the 2 cells unite, _______ (the first cell division) will take place.
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Mitosis
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Initial cell division usually starts within _________ after fertilization.
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24 hours
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(Fertilization) Cell division continues until a round mass of about 12-16 cells formed called a _______.
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Morula
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Morula consists of an outer layer of ________ cells and an _______ cell mass.
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trophoblast, inner
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The trophoblast cells will soon become part of the _______ _______, such as the placenta.
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fetal membranes
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The inner cell mass will become _______ ______.
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Embryonic tissue
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What phase of mitosis is the resting phase of the cell?
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Interphase
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Which phase of mitosis is where things start moving and chromosomes become visible as chromatids?
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Prophase
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In which phase of mitosis do spindle fibers appear and the cell loses its nuclear membrane?
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Metaphase
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In which phase of mitosis do the spindle fibers duplicate and pull apart?
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Anaphase
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In which phase of mitosis does the furough appear between 2 identical cells which eventually totally split?
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Telophase
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How many chromosomes does a gamete (sperm or egg) have?
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23
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How many chromosomes does a human zygote have?
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46
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