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Question

Chiasmata were first seen by
  1. Janssen
  2. Johannsen
  3. Morgan
  4. Moses

A
Johannsen
B
Moses
C
Janssen
D
Morgan
Solution
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Chiasmata were first seen in diplotene stage at prophase 1. It is chromatid belonging to the homologous chromosome. It is a point where an exchange of genetic material occurs between chromosomal chromatids. The phenomenon of genetic chiasmata was discovered and described in 1909 by Frans Alfons Janssen, a professor at the University of Leuven in Belgium.
So the correct option is A.

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