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The DNA in eukaryotic cells wraps tightly around protiens called....
Histones
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....Proteins are generally involved in controlling the activity of specific regions of the DNA.
Nonhistone
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Each half of a chromosome is called..
Chromatid
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The constricted area of each chromatid is called...
Centromere
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...Are chromosomes that determine the sex of an organism, and they may also carry genes for other characteristics
Sex Chromosomes
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All of the other chromosomes in an organism are called...
Autosomes
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The two copies of each autosome are called...
Homologous Chromosomes
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A photomicrograph of the chromosomes in a dividing cell found in a normal human
Karyotype
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Cells having two sets of chromosomes are said to be..
Diploid
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Human sperm cells and egg cells are..
Haploid cells
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...Is the division of a prokaryotic cell into two offspring cells
Binary fission
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..Results in new cells with genetic material that is identical to that of the original cell
Mitosis
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...Reduces the chromosomes number ny half in new cells
Meiosis
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..Is the repeating set of events that make up the life of a cell
Cell Cycle
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The time between cell divisions is called..
Interphase
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During Mitosis, or ....., The nucleus of a cell divides
M Phase
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...Is the division of a cytoplasm of the cell
Cytokinesis
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First stage of interphase where offspring cells grow to mature size is called..
G1 Phase
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After cells have reached a mature size, they typically proceed into the next phase of interphase where the cell's DNA is copied, called...
S Phase
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...Represents the time gap following DNA synthesis and preceding cell division
G2 Phase
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Cells can also exit the cell cyle and enter into a state called...
G0 Phase
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...Is the first phase of mitosis
Prophase
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Two pairs of dark spots
Centrosomes
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In animal cells, each centrosome contains a pair of small, cylindrical bodies called...
Centrioles
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...Made of microtubules radiate from the centrosomes in preparation for mitosis
Spindle Fibers
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..Serves to equally divide the chromatids between the two offspring cells during cells division
Mitotic Spindle
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Disk shaped protein
Kinetochore
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... Extend from the kinetochore of each chromatid to one of the centrosomes
Kinetochore Fibers
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...Extend across the dividing cell from centrosome to centrosome
Polar Fibers
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Second phase of Mitosis
Metaphase
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During...., the chromatids of each chromosome seperate at the centromere and slowly move, centromere first, toward opposite poles of the dividing cell.
Anaphase
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Fourth phase of mitosis
Telophase
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The area of the cell membrane that pinches in and eventually seperates the dividing cell into two cells in called...
Cleavage Furrow
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In plant cells, vesicles formed by the Golgi apparatus fuse at the midline of the dividing cell, forming a membrane- bound cell wall called...
Cell Plate
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Meiosis produces haplois reproductive cells, called...
Gametes
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The pairing of homologous chromosomes, which does not occur in mitosis, is called..
Synapsis
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Each pair of homologous chromosomes is called...
Tetrad
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Portions of chromatids may break off and attach to adjacent chromatids on the homologous chromosome- a process called..
Crossing- Over
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Crossing- over results in...
Genetic Recombination
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The random seperation of the homologous chormosomes is called..
Independent Assortment
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In the development of sperm cells, a diploid reproductive cell divides melotically to form four haploid cells called..
Spermatids
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Production of sperm cells called..
Spermatogenesis
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... Is the production of mature egg cells, or ova
Oogenesis
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The three other products of meiosis
Polar Bodies
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.. Is the production of offspring from one parent
Asexual Reproduction
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.. Is the production of offspring through meiosis and the union of a sperm and an egg
Sexual Reproduction
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