Cell Cycle and Cell DivisionHard

Question

During which stages (or prophse I substages) of meiosis do you expect to find the bivalents and DNA replication repectively ?

Options

A.Pacuytene and intrphase (between two meitoic divisons)
B.Pachytene and interphaese (just prior to prophase I)
C.Pachytene and S phase (of interphase just prior to prophase I)
D.Zygotene and S phase (of interphase just prior to prophase I)

Solution

In bivalent formation of chromosomes during meiosis the homologous chromosomes are arranged in pairs. The phenomenon is called synapsis and it occurs during zygotene stage. DNA replication occurs during S phase or synthetic phase which is the second phase of interphase which is the second phase of interphase.

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