Question

1. Draw and label each stage of the cell cycle for MEIOSIS.

*Color-code: color-coding will really help when it comes to crossing over

2. Include all important terminology/definitions, even if the terminology is repeated in multiple stages

3. Include a brief summary, describing what is taking place in each stage.

Answer 1

Meiosis is an reductional division. In humans miosis takes place during gamete formation from the germ cells in order to facilitate sexual reproduction. The entire meiosis is divided into two stages that is meiosis 1 and meiosis II. Meiosis involves recombination and genetic variability therefore the daughter cells are genetically different from parental cells whereas in mitosis the daughter cells are completely identical to The parental cells. Therefore miosis helps in creating genetic variability and diversity in a population

Meiosis 1:- in the first stage of meiosis 1 the diploid cell having 2N number of chromosomes divides to form two haploid daughter cells having only number N of chromosomes (half the number of chromosomes as of parental cell).

Eg:- If division started with 46 chromosome (2N) split to form two haploid daughter cell having 23 chromosome in each .

Meiosis II :- meiosis II is similar to mitosis. It is an equation all division followed by formation of four haploid cells having and number of chromosomes. The division takes place following same stages of of mitosis that is prophase, metaphase telophase and anaphase.

Phases of meiosis

Meiosis is very similar to mitosis and follows same stages like mitosis . During interphase cell undergoes cell division and replication and normal growth.

In prophase 1 the chromosome starts to condense and start pairing up. Synapses takes place in prophase 1.

In metaphase 1 the chromosomes align at equatorial points.

In anaphase 1 homologos chromosomes move towards the opposite pole.

In telophase 1 the chromosomes move towards the opposite pole self was formed and cytoplasmic division takes place to form two haploid daughter cells .

Meiosis 2

It is comparatively simpler and shorter process than compared to meiosis 1 the cells enter meiosis 2 once it is done with meiosis 1.

Similiar stages take place in meiosis 2 just like prophase 2, metaphase 2 telophase 2 and anaphase II this leads to the formation of four daughter cells having and number of chromosome. These chromosomes are genetically variable and different from parental cells due to recombination crossing over and independent assortment during gamete formation.