What is the first haploid stage of spermatogenesis?

Answer 1

In humans, cells are usually diploid or haploid. Diploid cells are two complete sets of chromosomes. At fertilization, we usually receive one complete set of chromosomes from each parent. Most of our body is diploid. Haploid cells have one complete set of chromosomes. Sex cells (sperm and eggs) are usually haploid. When two haploid cells fertilize each other, the resulting diploid cell can grow into a normal diploid embryo and ultimately to a full grown adult.

Mitosis produces diploid cells and is called mitotic cell division. Meiosis produces haploid cells and is called meiotic cell division. The stages that describe the process of cell division are the same in both mitosis and meiosis. They are Prophase, Metaphase, Anaphase and Telophase. Mitosis and meiosis are part of a larger process called the cell cycle. The stage interphase is part of the cell cycle, but not part of either mitosis or meiosis.

Meiosis consists of two rounds of cell division. The stages are distinguished from each other by using the Roman numerals I and II after the stage name, as in Metaphase I and Metaphase II. One full round of meiosis is Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II and finally Telophase II.

Meiosis I the cell division that moves the cells from diploid to haploid. The exact stage of Meiosis I that moves the cell from diploid to haploid can be debated. Prophase I and Metaphase I are not options because the chromosomes have not really started to separate yet.

Anaphase I is the first realistic answer because the chromosomes begin to separate.

Telophase I shows the chromosome completely separated but the cell has not yet become two cells. The nuclei divide during a process called karyokinesis. The newly formed nuclei are in essence haploid, but the original cell is still intact and still has two full sets of chromosomes - albeit the sets are residing in different areas of the same cell.

The cell divides into two cells shortly after Telophase I. Thi is called cytokinesis. At this point the new cells are certainly haploid.

So the short answer is most definitely either anaphase I or telophase I. The stage that you choose will depend on the standards you use. Anaphase I will be the earliest by looking only at the nuclei. Telophase I will be the latest by looking only at the nuclei. Cytokinesis after Telophase I will be the latest.

I am assuming that this is a question for a Biology class. The key is to understand the difference between diploid and haploid and HOW they come about. Answering either Anaphase I or Telophase I should work IF you are able to support your answer by describing the process of Meiosis accurately.

Answer 2

Haploid cells are produced in the Meiosis I stage. Meiosis I produces two haploid daughter cells. A haploid cell has only one copy of every chromosome.

Answer 3

Anaphase II

This is the stage at which point 2n sister chromatids are separated to n chromatids.

Answer 4

this happens in the stage of meiosis 2

Answer 5

sa ulo mo !

Answer 6

Anaphase 1

Answer 7

Anaphase ii

Answer 8

prophase II