Question

Visible expression of the genetic phenomenon of crossing over is called

• A. Recombination
• B. Condensation
• C. Chiasmata
• D. Spiralization

Answer 1

Answer: (C)

Chiasmata

• During the meiotic division, there occurs a phenomenon which is called genetic recombination.
• This event occurs and can be observed in the prophase 1 of the meiosis 1. There is an exchange of the genetic material between the homologous chromosomes.
• The non-sister chromatids of these homologous chromosomes overlap and then the chiasmata are formed. This leads to an exchange of genes between these chromosomes. This results in variation in the offsprings which are formed.

Thus, the correct answer is option C.