A) Tetrad
B) Pairs of non-homologous chromosomes
C) Pairs of several chromatids
D) Pairs of homozygous chromosomes
Correct Answer: A
Solution :
Bivalent formation occurs in pachytene of meiosis, In this stage, two chromatids of homologous chromosome (Bivalent) later on forms a cross and now showing a tetravalent or tetrad stage.
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