Tag Archives | Euploidy

Autotetraploids: Origin and Chromosome Pairing | Euploidy

In this article we will discuss about:- 1. Origin and Occurrence of Autotetraploids 2. Chromosome Pairing and Chiasma Formation in Autotetraploids 3. Fertility 4. Genetics. Origin and Occurrence of Autotetraploids: Autotetraploids originate both spontaneously and can be experimentally induced; the various means of their origin are briefly described below: A. Spontaneous origin: (1) In diploid (2x) plants, sometimes a tetraploid [...]

By |2016-07-12T13:50:59+00:00July 12, 2016|Chromosome Number|Comments Off on Autotetraploids: Origin and Chromosome Pairing | Euploidy
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3 Main Types of Allopolyploidy

The following points highlight the three main types of allopolyploidy. The types are: 1. Segmental Allopolyploidy 2. Genome Allopolyploidy 3. Auto-Allopolyploidy. Type # 1. Segmental Allopolyploidy: Some degree of homology (partial homology) may exist between some chromosome of one genome and those of the other genome. Therefore, in such polyploids both bivalents and multivalents are formed. This type of chromosome [...]

By |2016-07-12T13:50:59+00:00July 12, 2016|Chromosome Number|Comments Off on 3 Main Types of Allopolyploidy
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