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

Tamilnadu BoardEnglish MediumSTD 12BIO BOTANYChromosomal Basis of Inheritance.3 Marks
Question
Classify cross over.
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Answer

  1. Single cross over: Formation of single chiasma and involves only two chromatids out of four.
  2. Double cross over: Formation of two chiasmata and involves two or three or all four strands.
  3. Multiple cross over: Formation of more than two chiasmata and crossing over frequency is extremely low.

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