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| 1 |
One parent (one cell) passes a duplicate of its genetic info to its offspring (daugter cell),...
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Asexual reproduction
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type of cell division:
1. cell type : Somatic (body) cells --> somatic cells
2. process:...
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Asexual reproduction
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Two parents contribute half their genetic info to their offspring; resulting in genetically...
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Sexual reproduction
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type of cell division:
1. cell type: germ cells --> sex cells (gametes)
2. process: meiosis
3....
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sexual reproduction
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Each new generation must recieve a duplicate of all parental DNA.
major event of cell...
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DNA replication
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Distribution of DNA to new nuclei in forthcoming daughter cells.
major event of cell...
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Nuclear Division
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The actual cytoplasmic division of a parental cell into two daughter cells. Each new cell must...
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Cytokinesis
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Uncondensed chromosomes
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Chromatin
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Molecules of DNA complexed with proteins.
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chromosomes
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One half of a duplicated chromosome (like one of a pair of socks)
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chromatids
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Joins sister chromatids (like a clothespin); region where the chromosome will attach to microtubules...
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Centromere
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Code for the same body traits
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Homologous chromosomes
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Nongamete body cells; chromosomes exist as pairs (homologous chromosomes)
e.g. human somatic...
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Somatic cells
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| 14 |
Form gamete sex cells; chromosome number is reduced by half, such that haploid gametes result.
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Germ cells
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Half (n) a set of chromosomes
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haploid
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containing a full set (2n) of chromosomes
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diploid
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| 17 |
A recurring sequence of events that extends from the time of a cell's formation until its division...
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the cell cycle
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| 18 |
Occupies only a small part of a cells existance (about 10%)
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Mitosis
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| 19 |
Occupies about 90% of a cells existance; consists of 3 stages.
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Interphase
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The cells mass increases; new cell components are synthesis.
(stage of interphase)
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G1 - "gap" stage
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| 21 |
The DNA is doubled.
(stage of interphase)
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S - "synthesis" stage
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components assembled for distribution.
(stage of interphase)
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G2 - "Gap" stage
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| 23 |
Chromosomes are moved by a spindle apparatus composed of ____________.
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Microtubules
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| 24 |
Microtubules organizing center
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centriole
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| 25 |
____________ extend from two "poles" established by centrioles
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microtubules
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collectively, the centrioles plus the microtubuless form "_____", or starlike projections.
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asters
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| 27 |
Mitosis begins
Stage of mitosis
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Prophase
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| 28 |
1. Chromosomes become visible as rodlike units, each consisting of two sister chromatids.
2....
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Prophase
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| 29 |
Chromosomes "meet in the middle"
Stage of mitosis
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Metaphase
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| 30 |
1. Nuclear membrane breaks up in transition between pro-and metaphase
2. Sister chromatids...
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Metaphase
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| 31 |
Chromatids seperate
Stage of mitosis
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Anaphase
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1. Sister chromatids seperate and move toward opposite poles.
a....
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Anaphase
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| 33 |
Chromosomes arrive at the poles and decondense.
Stage of mitosis
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Telophase
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| 34 |
1. The nuclear envelope forms from the fusion of small vesicles.
2. Mitosis is complete.
(two...
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Telophase
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| 35 |
"cell splitting"
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cytokinesis
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| 36 |
contractile microfilaments at the cleavage furrow pull the plasma membrane inward.
Cytokenisis...
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animal cells
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| 37 |
Form a cell plate (cellulose) that seperates the two new cells.
Cytokenisis in _______...
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plant cells
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