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Chromosomal Basis of Inheritance. — BIO BOTANY STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12BIO BOTANYChromosomal Basis of Inheritance.3 Marks
Question
What is Synapsis? Explain its types.
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Answer

Pairing of homologous chromosomes during the zygotene stage of prophase I of meiosis I is called synapsis. Synapsis is of three types:
  1. Procentric synapsis: Pairing starts from the middle of the chromosome.
  2. Proterminal synapsis: Pairing starts from the telomeres.
  3. Random synapsis: Pairing may start from anywhere.

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