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 […]
Mechanism of Crossing Over | Cell Division
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Chromosome Pairing: Types, Factors and Significance
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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 […]
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