describe what happens during prophase I and metaphase I and how these phases play an important role in the genetic diversity of the daughter cells produced

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04-05-2018
Biology

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describe what happens during prophase I and metaphase I and how these phases play an important role in the genetic diversity of the daughter cells produced

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biologistkhan biologistkhan · Answer 1 · 2018-05-04T19:52:07+02:00

Prophase 1
Prophase 1 consists of following stages.

1. Leptonen
The chromosome get condense and attach to nuclear membrane through telomeres.

2. Zygotene
In this step synapsis (pairing of homologous chromosomes) occurs.

3. Pachytene
Between non sister chromatids crossing over occurs.

4. Diplotene
Synapsis ends, while non sister chromatids remain attached at chiasmata.

5. Diakinesis
chromosome become fully condense and nuclear membrane disappers.

Metaphase 1
During this stage chromosomes arrange themselves in the center at equator and form equatorial plate.

Role in genetic diversity
Crossing over is one of the most important phenomenon responsible for genetic recombination, because the offspring which are formed from parents are genetically variant and are best adopted to environmental changes.