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

Tamilnadu BoardEnglish MediumSTD 12BIO BOTANYChromosomal Basis of Inheritance.3 Marks
Question
How crossing over differs from linkage?
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Answer

Linkage:
  1. The genes present on chromosome stay close together.
  2. It involves same chromosome of homologous chromosome.
  3. It reduces new gene combinations.
Crossing over:
  1. It leads to separation of linked genes.
  2. It involves exchange of segments between non-sister chromatids of homologous chromosome.
  3. It increases variability by forming new gene combinations. Leading to formation of new organism.

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