NEET Biology Cell Cycle And Cell Division Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Cell Cycle And Cell Division Topic Based

Question & Answer Discuss:

During meiosis I, the chromosomes start pairing at

(a) Zygotene

(b) Leptotene

(c) Pachytene

(d) Diplotene

Answer: (a)

During zygotene, a substage of Prophase I of meiosis I, chromosomes start pairing together called synapsis. Such paired chromosomes are called as homologous chromosomes. A complex structure i.e., synaptonemal complex is formed by a pair of synapsed homologous chromosomes called a bivalent or a tetrad.

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