Categorii: Tot - meiosis

realizată de April Papps 5 ani în urmă

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Interephase and Meiosis I

The process of meiosis is crucial for sexual reproduction and involves two distinct stages: Meiosis I and Meiosis II. During Meiosis I, homologous chromosomes are separated after undergoing processes like synapsis and crossover.

Interephase and Meiosis I

Interephase and Meiosis I

Meoisis II Separates sister chromatids

Telophase II & cytokinesis
Cytokinesis forms four haploid daughter cells (two Shown)
Anaphase II
Centromeres separate, Sister chromatids move to poles
Metaphase II
* Chromosomes arrange on metaphase II plate
Prophase II
* Nuclear envelope breaks down, centrosomes move to poles, spindle microtubules form & attach to both sides centromeres, chromosomes move towards meta-phase II plate.

Interphase

Telephase I & Cytokinesis I
* Nuclear envelope may re-form * Cylokinesus forms two haploid daughter cells * Sister chromatids remain attached
Anaphase I
homologous chromosomes move to poles
Metaphase I
Tetrads arrange on Metaphase I plate
Prohase I
* Chromosomes condense, form tetrads * synapsis non-sister chromatids cross-over * nuclear envelope breaks down, centrones move to poles, spindle microtubules form & attach to one side centromeres, tetrads move towards metaphase I plate.Subtopic
Meiosis I Separate homologous chromosomes
Centromeres chromosomes replicate