Question

Which of the following statements hold true for bivalents?
(i) Generally a bivalent is an association of four chromatids and two centromere.
(ii) It is a homologous chromosome.
(iii) Crossing over occurs between two different kinds of bivalents.

• A. Both (i) and (iii)
• B. Only (ii)
• C. Only (i)
• D. Both (i) and (ii)

Answer 1

The correct option is C Only (i)

During prophase-1 of meiosis homologous chromosomes pair with each other to form bivalents. A bivalent is an association of four chromatids and two centromere. These are paired homologous chromosomes. The process of crossing over occurs between non-sister chromatids of a bivalent.