Which description is correct for both oogenesis and spermatogenesis?
The cells have 46 chromosomes until meiosis II is completed.
After meiosis I, the cells have 23 chromosomes.
Part of meiosis I is completed before birth.
The entire process takes about 70 days.

In meiosis there is a reductive phase (meiosis I) and the not reductive phase (meiosis II). Option B). After meiosis I, the cells have 23 chromosomes.

What is meiosis?

Meiosis is a process by which, from a diploid germ cell (2n), four haploid cells (n) -the gametes, sperm and egg cells- are produced. This is the gametogenesis process.

Each daughter cell has half of the chromosomes of the original one.

There are two phases in meiosis:

the first one in which occurs a chromosome's reduction division, and

the second one where the cell suffers a new division, but this one is not a reductive one.

So, if the germ cell has 46 chromosomes, after meiosis I each new cell will have 23 chromosomes, because meiosis I is the reductive phase.

Option B is correct.

You can learn more about meiosis and gametogenesis at

https://brainly.com/question/12149107

https://brainly.com/question/15719103

https://brainly.com/question/1446790

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Which description is correct for both oogenesis and spermatogenesis? The cells have 46 chromosomes until meiosis II is completed. After meiosis I, the cells have 23 chromosomes. Part of meiosis I is completed before birth. The entire process takes about 70 days.

Respuesta :

What is meiosis?

Otras preguntas

Which description is correct for both oogenesis and spermatogenesis?
The cells have 46 chromosomes until meiosis II is completed.
After meiosis I, the cells have 23 chromosomes.
Part of meiosis I is completed before birth.
The entire process takes about 70 days.