Does meiosis begin with 46 or 92 chromosomes in humans?

Question

"Meiosis is a two-part cell division process in organisms that sexually reproduce, which results in gametes with one half the number of chromosomes of the parent cell." I found this from another question.

So if a human diploid cell has 46 chromosomes, after meiosis I, how many chromosomes does the two daughter cells have? I know for a fact that after meiosis II, the 4 daughter cells each contain 23 chromosomes. Doesn't that mean 4 times 23 equals 92 chromosomes?

Answer 1

You start of 46 chromosomes (x-shaped), the two daughter cells have 23 chromosomes (x-shaped), when the daughter cells devide, the x-shaped chromosome will be teared apart like in mitosis, so you'll still have 23 chromosomes in each daughter cell

Answer 2

We don't have 92 different chromosomes. 92 is 4 copies of the same 23 chromosomes. the 23 chromosomes are the half of the 46 total chromosomes of an individual that are passed on to the gamete (sperm or egg) and then to the baby if the gamete unites with another gamete. Since each gamete has 23 chromosomes, the new baby now has 46 chromosomes, a complete human. 23 from each parent.

Answer 3

92 single chromatids are in the cell before meiosis (4 copies). 46 pairs (of the 92) chromosomes may also be called 46 chromosomes. 92 chromatids are also called 92 chromosomes. Or you can just say "unpaired chromosomes." If I were the one to name genetic terms, I'd make everything simple as pie.

Answer 4

we're looking the cells individually, as they are separate cells. so we look at it and say that there are 23 chromosomes each. with your way of thinking in our bodies we have 46 x 381927837129836281368912 x 10^9 number of chromosomes and although that's true (the exaggeration i mean) we only care how many there are in each cell.

by the end of meiosis I, each daughter cell is haploid. those daughter cells then divide into 4 and still remain haploid.

Answer 5

Before meiosis - 46 chromosomes (no human cells ever have 92).

After meiosis I - 23 chromosomes that are still double-stranded. They doubled their DNA before meiosis started, and during meiosis I each double-stranded chromosome got away from its homologous partner.

After meiosis II - four cells, each with 23 single-stranded chromosomes. During meiosis II the double-stranded chromosomes split at their centromeres and the sister chromatids are pulled apart from each other.

So it isn't 4 x 23.

46 double stranded chromosomes --> 23 double-stranded chromosomes per cell after meiosis I --> 23 single-stranded chromosomes per cell after meiosis II.

Answer 6

46

Answer 7

46 chromosomes my child.