meitosis and mesosis cell divison with …

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meitosis and mesosis cell divison with all the steps and their explanation?..................................please i need the answer fast please

Posted by Pankhuri Sharma 5 years, 2 months ago

Pankhuri Sharma 5 years, 2 months ago

but aren't there more steps

Gaurav Seth 5 years, 2 months ago

Mitosis	Meiosis
Interphase
Each chromosome replicates. The result is two genetically identical sister chromatids	Chromosomes not yet visible but DNA has been duplicated or replicated
Prophase
Prophase –Each of the duplicated chromosomes appears as two identical or equal sister chromatids, The mitotic spindle begins to form. Chromosomes condense and thicken	Prophase I – crossing-over recombination – Homologous chromosomes (each consists of two sister chromatids) appear together as pairs. Tetrad is the structure that is formed. Segments of chromosomes are exchanged between non-sister chromatids at crossover points known as chiasmata (crossing-over)
Metaphase
Metaphase -The chromosomes assemble at the equator at the metaphase plate	Metaphase I Chromosomes adjust on the metaphase plate. Chromosomes are still intact and arranged as pairs of homologues
Anaphase
Anaphase – The spindle fibres begin to contract. This starts to pull the sister chromatids apart. At the end of anaphase, a complete set of daughter chromosomes is found each pole	Anaphase I Sister chromatids stay intact. However, homologous chromosomes drift to the opposite or reverse poles