Examlex
Environmental events can "turn on" genes,ensuring that they are
Chromatin
A complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells, structures that condense to facilitate mitosis and meiosis.
Chiasmata
The points of crossing over and genetic exchange between homologous chromosomes during meiosis.
Crossing Over
A process during meiosis in which homologous chromosomes exchange portions of their chromatids, leading to genetic variation.
Cleavage Furrow
A constricted region of the cytoplasm that forms and progressively deepens during cytokinesis of animal cells, thereby separating the two daughter cells.
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