In pachytene,each tetrad contains
(1)Two chromatids
(2)One chromatid
(3)Four chromatids (4)Three chromatids
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Explanation:
Breakage and reunion hypothesis proposed by Darlington (1937). (c) Chromatids of pachytene chromosome are attached with centromere. (d) A tetrad consists of two sets of homologous chromosomes each with two chromatids. Each tetrad has four kinetochore (two sister and two homologous).
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Answer: Two sets of cromatids.
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