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44 Cards in this Set
- Front
- Back
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Binary Fission
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Cell Division in unicellular organism is for reproduction
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3 Parts to Chromosome
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-2 Chromatids
-1 Centromere |
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How many chromosomes does humans have?
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Humans have 46 chromosomes.
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When can you start counting chromosomes?
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When they began to split.
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Diploid #
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Total number of chromosomes.
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Haploid #
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Number pairs of chromosomes.
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Sexual Reproduction
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Chromosomes will be in pairs.
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Plants do not have:
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Centrioles
Asters Polar Fibers Kinetichore Fibers -uses cell plates. |
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Interphase
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resting place/stage.
[a time of cell growth & development] |
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G1 Period
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Growing developed; where the cell starts.
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S period
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Replicate DNA.
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G2 Period
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Grows parts for cell division; prepares.
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Mitosis
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Division of Nuclear division.
-produces sex cells. |
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Cytokinesis
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division of cytoplasm.
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How many cells does it take to make four sperms?
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One.
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Genetic Recombination
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in Meiosis, genes are combined in new ways.
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Important Cell Cycles:
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Interphase
Mitosis Cytokinesis |
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Important Cell Division:
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Mitosis
Cytokinesis |
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Cross-Over
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When genes switch places
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Asexual Reproduction
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Production of offspring from one parent/thing.
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Body Cells
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46 Chromosomes
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Sex Cells
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23 Chromosomes
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Prophase
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first phase in mitosis
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metaphase
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second phase in mitosis
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Anaphase
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third phase in mitosis
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Telophase
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final stage in mitosis.
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Homologous
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Identical pair of chromosomes.
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Anagolous
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Works a like bt acts different.
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Chromatid
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half of a chromosome.
-centromere joins the chromosome. |
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Cell Plate
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develops in the cell wall.
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Can one cell become two cells?
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Yes.
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Three phases of interphase
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G1
S G2 |
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G
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the cell double in size and enzymes and organisms such as mitochondria and ribosomes, roughly double in matter.,
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Meiosis I
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first division, the homologous chromosome are seperated into seperate cells.
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Meiosis II
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Second division, segregated.
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All cells come from
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Preexisting cells.
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Chromatin
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a dense substance within a nuclear membrane of a non living cell.
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Species
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has a distinctive number of chromosomes per cell.
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Mitosis
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can increase the number of body cells without changing the information contained in the DNA of those cells.
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Cytokinesis
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Process of nuclear division.
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Polar fibers
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Dark, cylindrical bodies that that move toward opposite ends, or poles of a cell.
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When all chromosomes are arranged along the equator of a cell,
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the cell is in metaphase.
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Meiosis I
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produces two diploid cells.
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Formation of Egg & Sperm
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in animals 1N daughter cells produced by meiosis often differentiate to form GAMETES, sexual reproduction cells.
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