Division of a diploid cell to produce four haploid cells
4
votes
2answers
4k views
Does Human Female Meiosis II occur after fertilization with sperm?
I am reading the answer and I am getting confused by the sentence:
At the end of meiosis I females have two daughter cells and meiosis II
only occurs if and when fertilization occurs by a sperm ...
5
votes
1answer
68 views
Number of spindle fibres during Metaphase?
During metaphase, the chromosomes are arranged on the equatorial plate and are attached to spindle fibres. After S phase, can the cell be said to attain the configuration of 4n?
Also, during ...
3
votes
1answer
37 views
Are any organisms known to use meiosis I to create non-identical offspring asexually?
So, there are numerous species of animals who use parthenogenesis, but to my knowledge the reproduction is clonal. That is, the offspring are identical to the mother. Are there any documented cases ...
3
votes
3answers
322 views
Are there verbs for “undergo mitosis” and “undergo meiosis”?
From my experience on SE sites, I believe this is the right site to ask this question under "terminology".
I've been trying to find out whether English has one-word verbs for "undergo mitosis" and ...
1
vote
1answer
42 views
Can IVF decrease the probability of trisomy in the fetuses of older mothers?
Is trisomy mostly due to complications with fertilization?
If so, does in vitro fertilization reduce the probability of trisomy for the fetuses of older mothers?
If not, can zygotes be screened ...
7
votes
2answers
216 views
Why doesn't recombination occur in male Drosophila?
"Males do not show meiotic recombination, facilitating genetic studies."
For a while I have known that this phenomenon occurs, this quote comes from the Wikipedia page on Drosophila melanogaster, ...
10
votes
2answers
130 views
protocol for pulldown of DNA breakpoints?
Is there any method to do pulldown enrichment of DNA breakpoints from a cell? I have found this paper reporting a method to enrich for the DNA single-strand breakpoints from meiotic recombination ...
3
votes
2answers
343 views
What type of cell do you start with in Meiosis?
Okay, I was learning about mitosis and meiosis in school and had a question. I know in Mitosis you first start off with a Diploid (2N) cell and then end up with two ...
3
votes
0answers
35 views
Is there a gene that starts meiosis 2?
Yesterday I thought about a question and asked it to my friend. The question was
which gene is completely the same for a male cell that made meiosis 1 recently.
My answer was the gene that starts ...
6
votes
2answers
437 views
What is the main general difference between Mitosis and Meiosis?
I found such a clause:
The general principle is that mitosis creates somatic cells and
meiosis creates germ cells.
However, I cannot agree. Each gametogonium needs to go through mitosis before ...
4
votes
1answer
151 views
What's the distinction between a tetrad and a synaptonemal complex in meiosis?
What's the distinction between a tetrad and a synaptonemal complex in meiosis? Are they synonyms?
I ask because the concepts seem very closely related, but it seems like there may be a subtle ...
3
votes
1answer
117 views
How do you see the stage of the second meiotic arrest in oogenesis in the given video?
My old question raised this new question. After reading this page I can say now that metaphase is the stage in which the second meiotic arrest occurs within oogenesis:
The oocyte is arrested again ...
2
votes
1answer
326 views
What does entering of sex chromosomes to gametes mean during meiosis I?
I am reading one answer about meiosis:
During meiosis I, the sex chromosomes separate and enter different
sperm or egg cells (gametes).
I assume that sex chromosomes refer here to homologous ...
-3
votes
1answer
1k views
At what stage of meiosis does “first meiotic arrest of oogenesis” occur?
An exam question asked what stage of meiosis corresponds with "first meiotic arrest of oogenesis". I can't work out the answer from the wiki page - can anyone explain which step this refers to?
