Tag Archives | Chromosome Pairing

Mechanism of Crossing Over | Cell Division

The following points highlight the four main hypothesis proposed for the mechanism of crossing over. The hypothesis are: 1. The Classical and Neo-Classical Hypotheses 2. Partial Chiasma Type Theory 3. Belling's Hypothesis 4. Copy-Choice Hypothesis. Mechanism of Crossing Over: Hypothesis # 1. The Classical and Neo-Classical Hypotheses: The classical hypothesis of crossing over was proposed by Sax in 1932; it [...]

By |2016-07-12T13:51:01+00:00July 12, 2016|Cell Division|Comments Off on Mechanism of Crossing Over | Cell Division
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Chromosome Pairing: Types, Factors and Significance

In this article we will discuss about:- 1. Types of Chromosome Pairing 2. Factors Affecting Chromosome Pairing 3. Significance 4. Molecular Basis.  Types of Chromosome Pairing: Chromosome pairing may be divided into three main types, viz., primary pairing, secondary association and non-homologous association, which may be further classified (Fig. 11.1).   Primary Pairing: Primary pairing is observed at interphase, mitosis [...]

By |2016-07-12T13:51:01+00:00July 12, 2016|Cell Division|Comments Off on Chromosome Pairing: Types, Factors and Significance
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