Group of compounds to which DNA and RNA belong.
nucleic acids
Small RNA containing body within the cell nucleus.
nucleolus
Carriers of genetic characteristics in the nucleus.
chromosomes or chromatin
Nucleic acid which occurs mainly in the cytoplasm.
RNA
Stage in the cycle of a cell when neither the nucleus nor the cytoplasm is actively dividing.
interphase
Gene containing thread-like body which appears conspicuously during cell division in the nucleus.
chromosomes
One half of a chromosome as seen during cell division.
chromatid
Stage in cell division during which the chromosomes migrate to the poles.
anaphase
Point at which homologous chromosomes cross over in meiosis.
chiasma
Chromosome number twice that of a gamete of a given species.
diploid
Cleavage of the cell cytoplasm which follows karyokinesis.
cytokinesis
Region on a chromosome at which a spindle fibre is attached during cell division.
centromere
Mutual exchange of genetic information between homologous chromosomes at the chiasmata.
crossing-over
Stage during mitosis in which the chromosomes arrange themselves at the equator of the cell.
metaphase
Organelle which gives rise to the spindle in a dividing animal cell.
centriole/centrosome
Type of cell division during which reduction of chromosomes takes place.
meiosis
Process by means of which gametes are formed during meiosis.
gametogenesis
