Enlist the different stages of prophase 1

1.	Enlist the different stages of prophase 1
Answer» The PROPHASE I of meiosis occurs in the following stages: 1. Leptotene- This phase is the start of prophase-I. It is marked by the condensation of the chromosomes. 2. Zygotene- In this phase the homologous chromosomes start pairing up, called the synapsis. The synaptonemal complex starts building up. This complex is required to HOLD the homologous chromosomes at a place close to each other. Bivalent chromosomes are VISIBLE at this stage. 3. Pachytene- In this stage, this non-sister chromatids of homologous chromosomes exchange their parts, the process is called the crossing over. The ATTACHMENT point of the crossing-over of the non-sister chromatids is called chiasma. 4. Diplotene- The crossing-over process is completed by this stage. The homologous chromosomes REMAIN attched at the point of chiasma.

Answer»

The PROPHASE I of meiosis occurs in the following stages:

1. Leptotene- This phase is the start of prophase-I. It is marked by the condensation of the chromosomes.

2. Zygotene- In this phase the homologous chromosomes start pairing up, called the synapsis. The synaptonemal complex starts building up. This complex is required to HOLD the homologous chromosomes at a place close to each other. Bivalent chromosomes are VISIBLE at this stage.

3. Pachytene- In this stage, this non-sister chromatids of homologous chromosomes exchange their parts, the process is called the crossing over. The ATTACHMENT point of the crossing-over of the non-sister chromatids is called chiasma.

4. Diplotene- The crossing-over process is completed by this stage. The homologous chromosomes REMAIN attched at the point of chiasma.

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