Which of the following represents the correct order in...

Name: Problem 82, Chapter 10: Objective Biology for NEET
Uploaded: 2021-11-15T06:53:41-08:00
Duration: 56 s
Channel: Parvati Devi
Description: Which of the following represents the correct order in Prophase I? (a) Zygotene, diplotene, pachytene, leptotene, diakinesis (b) Diakinesis, diplotene, leptotene, pachytene, zygotene (c) Leptotene, zygotene, pachytene, diplotene, diakinesis (d) Pachytene, leptotene, zygotene, diplotene, diakinesis

Which of the following represents the correct order in Prophase I? (a) Zygotene, diplotene, pachytene, leptotene, diakinesis (b) Diakinesis, diplotene, leptotene, pachytene, zygotene (c) Leptotene, zygotene, pachytene, diplotene, diakinesis (d) Pachytene, leptotene, zygotene, diplotene, diakinesis

Which of the following represents the correct order in Prophase I?
(a) Zygotene, diplotene, pachytene, leptotene, diakinesis
(b) Diakinesis, diplotene, leptotene, pachytene, zygotene
(c) Leptotene, zygotene, pachytene, diplotene, diakinesis
(d) Pachytene, leptotene, zygotene, diplotene, diakinesis

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Key Concepts

Meiosis

Meiosis is a specialized form of cell division that reduces the chromosome number by half, producing genetically distinct gametes that are essential for sexual reproduction. It consists of two consecutive rounds of division, meiosis I and meiosis II, which together increase genetic variability in offspring.

Prophase I

Prophase I is the first and most intricate phase of meiosis I. During this stage, homologous chromosomes pair and undergo synapsis, a critical process that allows for crossing over, where segments of DNA are exchanged between chromatids. This stage sets the groundwork for genetic recombination and proper chromosome segregation.

Stages of Prophase I

Prophase I is subdivided into five distinct stages: leptotene, where chromosomes begin to condense; zygotene, when synapsis or pairing of homologous chromosomes starts; pachytene, the phase in which crossing over occurs; diplotene, where the synapsed chromosomes start to separate but remain attached at chiasmata; and diakinesis, which prepares the chromosomes for alignment on the metaphase plate in the subsequent division steps.

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