New investigations into the reduction phenomena of animals and plants.—Preliminary communication
| Autor: | John Bretland Farmer, J. E. S. Moore |
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| Rok vydání: | 1904 |
| Předmět: | |
| Zdroj: | Proceedings of the Royal Society of London. 72:104-108 |
| ISSN: | 2053-9126 0370-1662 |
| DOI: | 10.1098/rspl.1903.0026 |
| Popis: | The attention given by numerous investigators to those periodically recurring nuclear changes known as reduction divisions, has so far apparently resulted only in an increasingly wide divergence of opinion, both respecting the nature of the process and its significance, but there are nevertheless a number of cardinal facts upon which all are fairly agreed. It is generally admitted, for example, that during the reduction processes the number of the chromosomes is halved; that this is everywhere effected during the period of rest immediately proceeding the mitoses in question; that two consecutive mitoses appear to be intimately connected with this process, but the first of these, the heterotype division, is generally markedly distinct from other nuclear divisions; consequently it would seem probable that the explanation of the reduction in the number of the chromosomes, of reduction generally, is to be obtained through a minute study of the heterotype or synaptic prophase in a large number of animals and plants. |
| Databáze: | OpenAIRE |
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