Biology
- Chromosomal Aberration
Chromosomal aberration refers to a change in number of chromosomes, can occur on one, or several, or all of the chromosomes within a nucleus. This is cause by the failure of sister chromatids to separate during anaphase of mitosis or the failure of homologous...
- Recombination Occurs By Physical Exchange Of Dna
KEY TERMS:Crossing-over describes the reciprocal exchange of material between chromosomes that occurs during prophase I of meiosis and is responsible for genetic recombination. A bivalent is the structure containing all four chromatids (two representing...
- Prophase
Eduard Adolf Strasburger(1844-1912)Term: prophase Literally meaning: ?before the appearance?Origin: Anc Greek???/pro(=prefix denoting before, first)?????/phasis(=stage) > ?????/phasko(=imperfect tense of verb ??????/phemi=appear, show,...
- Synapse
Term: synapseOrigin: Anc Greek ???????/synapsis(=conjuction)???-/syn (prefix denoting ?with, together with?)+????/hapto (=fasten, adapt, clasp, bind) Coined: in 1897 by the English physiologist Sir Charles Scott Sherrington (1857-1952) and colleagues....
- Cell Anatomy
Cell Anatomy.Cell (from Flank Organ of Syrian Hamster)A cell is the functional unit of living beings. All the living beings are made up of one or more cells (the only exception are viruses, not considered living beings by many scientists). Each cell in...
Biology
synapsis
Term: synapsis
Origin: Anc Greek ???????/synapsis(=conjuction)
???-/syn (prefix denoting ?with, together with?)
+????/hapto (=fasten, adapt)
Coined: ?
In 1892 by T. Boveri described synapsis and meiosis in Ascaris
Definition:
Synapsis is the pairing of two homologous chromosomes that occurs during the first prophase of meiosis
- Chromosomal Aberration
Chromosomal aberration refers to a change in number of chromosomes, can occur on one, or several, or all of the chromosomes within a nucleus. This is cause by the failure of sister chromatids to separate during anaphase of mitosis or the failure of homologous...
- Recombination Occurs By Physical Exchange Of Dna
KEY TERMS:Crossing-over describes the reciprocal exchange of material between chromosomes that occurs during prophase I of meiosis and is responsible for genetic recombination. A bivalent is the structure containing all four chromatids (two representing...
- Prophase
Eduard Adolf Strasburger(1844-1912)Term: prophase Literally meaning: ?before the appearance?Origin: Anc Greek???/pro(=prefix denoting before, first)?????/phasis(=stage) > ?????/phasko(=imperfect tense of verb ??????/phemi=appear, show,...
- Synapse
Term: synapseOrigin: Anc Greek ???????/synapsis(=conjuction)???-/syn (prefix denoting ?with, together with?)+????/hapto (=fasten, adapt, clasp, bind) Coined: in 1897 by the English physiologist Sir Charles Scott Sherrington (1857-1952) and colleagues....
- Cell Anatomy
Cell Anatomy.Cell (from Flank Organ of Syrian Hamster)A cell is the functional unit of living beings. All the living beings are made up of one or more cells (the only exception are viruses, not considered living beings by many scientists). Each cell in...