Questions tagged [meiosis]
Division of a diploid cell to produce four haploid cells for the purposes of reproduction.
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Mechanism of random assortment of chromosomes
How does the random assortment of chromosomes during meiosis occur?
I am a mathematician, not a biologist, and I am surprised that it is difficult to find an answer to this question online (AI ...
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What determines whether a cell divides by Mitosis or Meiosis?
What I learn from biology class is that mitosis is for producing somatic cells in animals and the gametes of some plants. And meiosis is for production of animal's gametes.
I am curious about what ...
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Could multiplexed CRISPR disable the mitotic and meiotic genes of cancerous cells?
Although I believe there is a good reason -- or reasons -- why this theory, that CRISPR could disable the genes for division in cancerous cells, is incorrect, I haven't been able to find them.
In ...
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How frequently does recombination occur, and how long are the recombinated fragments?
I understand the mechanics of recombination, but am struggling with the 'scale'.
When two homologous chromosomes pair, roughly how many recombination events occur on average? I understand there will ...
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Can hybrids from closely related species with similar chromosomes reproduce?
Let's say the plant Triticum monococcum which has 2 sets of 7 chromosomes when diploid and 1 set of 7 chromosomes when haploid has the genome AA. When interbred with a different species that has the ...
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Considering Two Genes, Are There Only Two Possible Outcomes for the Four Gametes Produced After Meiosis, Regardless of Independent Assortment?
Is it true that for a single meiotic event when considering only two genes, there are only two possible genetic outcomes among the four gametes produced, regardless of whether the two genes are found ...
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Why is There a Necessity for Two Rounds of Cell Division and Four Daughter Cells in Meiosis
Why does meiosis involve two rounds of cell division instead of stopping after meiosis I, where each daughter cell would have one chromosome randomly selected from each pair of homologous chromosomes? ...
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What's the significance of DNA replication (S phase) before Meiosis?
From what I'm able to understand, Meiosis should end up with haploid cells with chromosomes having single chromatids (I don't know why it's necessary, but alright)
I understand that meiosis has a ...
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What makes protein binding to the DNA random?
We know that the genetic recombination process in known as a random process. On the other hand, it has also been discovered that certain proteins (such as PRDM9) determine what recombination hotspots ...
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How random is genetic recombination?
Two parents can have a very large number of different potential offsprings, and it's common knowledge that the daughter chromosomes in meiosis are produced randomly, i.e. in crossover, the exact spots ...
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If crossing over did not occur, would pairs of cells after meiosis II have the same genes?
If crossing over did not occur, would there be two pairs of cells with the same chromosomes after meiosis II? This question came to my mind while I was reading through my bio textbook. After meiosis I,...
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What does this statement pertaining to fission mean?
I was reading about fission on Wikipedia when I encountered the following statement under Fission of prokaryotes section.
Like in mitosis (and unlike in meiosis), the parental identity is lost.
What ...
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Why does Meiosis produce 4 daughter cells instead of 2? Won't splitting the initial diploid cell into two haploid cells be easier?
At first, I thought it was because of crossing-over, but when I thought more about it, that didn't seem reasonable. Why don't cells just do meiosis like this? (I know that we don't understand all the ...
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How is RNA content distributed in daughter cells during cell division?
During cell division, DNA becomes equally distributed between the daughter cells. But how is RNA content distributed in the daughter cells?
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At what point in evolution is a new species identified? [duplicate]
As we know, a change in allelic frequency leads to evolution, and as these changes accumulate a new species is created.
My question has two parts -
A classical definition of species which is now not ...
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