Cell cycle: Meiosis Steps Explained in Detail

Hi, thanks for watching my video about Meiosis of Cell cycle or Cell Division
In this video I'll walk you through:
- Overview of Meiosis: In this section you will learn a brief concept of Meiosis
- Meiosis occurs in gametes: you will learn the spermatogenesis and Oogenesis process in brief.
- You will understand the Importance of Meiosis:
Whereas in diploid organisms, mitosis produces two daughter cells with full diploid complements, meiosis produces gametes or spores that are characterized by only one haploid set of chromosomes. During sexual reproduction, haploid gametes then combine at fertilization to reconstitute the diploid complement found in parental cells.
Another major accomplishment of meiosis is to ensure that during sexual reproduction an enormous amount of genetic variation is produced among members of a species.
Such variation occurs in two forms. First, meiosis produces gametes with many unique combinations of maternally and paternally derived chromosomes among the haploid complement, thus ensuring that following fertilization, a large number of unique chromosome combinations are possible.
The second source of variation is created by the meiotic event referred to as crossing over, which results in genetic exchange between members of each homologous pair of chromosomes prior to one or the other finding its way into a haploid gamete or spore.
- Stages of meiosis: Meiosis 1 and Meiosis 2
- Stages of Prophase 1: leptotene, Zygotene, Pachytene, Diplotene, Diakinesis
- Crossing over and Synapsis: when homologous chromosomes come close to each other and joined by centromere this process is called synapsis. After synapsis homologous chromosomes exchange parts between by the process of crossing over. After crossing over a cross shap structure appear called chiasma or chiasmata.
Watch video for understanding all concepts of meiosis cell cycle.
#cellcycle #cellcycleandcelldivisionclass11 #meiosis #meiosiscelldivision #meiosis1and2

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