Question

Why is meiosis essential in the life cycle of an organism?

Answer 1

Explanation:

hey mate...

Meiosis play a vital role in the life cycle of an organism bcz

It enables conservation of specific chromosome no.

inc chances of variations mainly genetic variations that enables More chances of survival.

Hope u would like.

Answer 2

$\bf\underline{Answer:-}$

It's essential in the life cycle of an orgsiusm because it perfoms a vital role in the cycle as it enables specific conversation of chromosome numbers.

$\bf\underline{Additional\:Information:-}$

Gradually, meiosis in humans is basically a division process that takes us from a diploid cell i.e., one with two sets of chromosomes to haploid cells which is ones with a single set of chromosomes.

Furthermore, the haploid cells made in meiosis are sperm and eggs in humans.

$\large\bold{Phases:}$

Well meiosis is a lot like mitosis in a number of ways i.e., the cell goes through similar stages and uses similar strategies to organize and separate chromosomes. However, in meiosis, the cell has a more complex task. 

[But it still needs to separate sister chromatids (the two halves of a duplicated chromosome), as in mitosis. But it must also separate homologous chromosomes, the similar but nonidentical chromosome pairs an organism receives from its two parents.]

Coming to the point, Homologue pairs well gets separated during a first round of cell division, called "meiosis I". Sister chromatids separate during a second round which is called as "meiosis II".

So we see that there are two phases of meiosis namely known as meiosis I and meiosis II.

$\large\bold{Choromsomes\:in\:each\:meiosis:}$

$\large\underline{Meiosis\:I}$

Meiosis I begins with a diploid (2n = 4) cell and ends with two haploid (n = 2) cells.) In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I and that is (n = 23).

$\large\underline{Meiosis\:II}$

So here, the number of chromosomes well remains unchanged from the beginning till the end of meiosis II which is (n = 23). Spindle fibers reform and attach to centromeres in the prophase II.