Cell division and chromosome errors

AI Thread Summary
To ensure that daughter cells have identical genes in the same order and number as the parent cell during cell division, the cell must maintain the integrity of its chromosomes throughout the process of mitosis. Unlike meiosis, which involves genetic recombination and crossovers between homologous chromosomes, mitosis typically preserves the genetic material without rearrangement. However, chromosomal translocations can occur if there are double-strand breaks in the DNA, which are more likely to happen at repetitive sequences like long CG stretches. Enzymes play a crucial role in mediating the exchange of genes during crossover events in meiosis, but such mechanisms are not involved in the standard mitotic process.
sontag
Messages
42
Reaction score
0
What changes would have to be made to a cell
so that when it divides the genes in the daughter cells
are exactly the same,in the same order and number on the chromosomes,
as they were in the parent cell?
 
Biology news on Phys.org
What are you implying that happens otherwise during mitosis?

The daughter cells are always the same, only during meiosis do you get about 40 cross-overs, that occur due that the fact that homologous chromosomes are alligned next to each other.

I don't think that any rearranging takes place during mitosis, only in cells that have double strand breaks will you start seeing chromosomal translocations.
 
Strands are more likely to break where there is a long CG sequence e.g.
CG CG CG CG CG CG CG.Why is this?
Also when crossovers occur are enzymes needed to mediate exchange of
genes?
 
Last edited:

Thread 'Chagas disease now established in US'

Chagas disease, long considered only a threat abroad, is established in California and the Southern U.S. According to articles in the Los Angeles Times, "Chagas disease, long considered only a threat abroad, is established in California and the Southern U.S.", and "Kissing bugs bring deadly disease to California". LA Times requires a subscription. Related article -...
View full post »

Thread 'I need help understanding this quote about recent Natural Selection'

I am reading Nicholas Wade's book A Troublesome Inheritance. Please let's not make this thread a critique about the merits or demerits of the book. This thread is my attempt to understanding the evidence that Natural Selection in the human genome was recent and regional. On Page 103 of A Troublesome Inheritance, Wade writes the following: "The regional nature of selection was first made evident in a genomewide scan undertaken by Jonathan Pritchard, a population geneticist at the...
View full post »

Thread 'Fermentation using mixed legume and grain feedstock'

I use ethanol for cleaning glassware and resin 3D prints. The glassware is sometimes used for food. If possible, I'd prefer to only keep one grade of ethanol on hand. I've made sugar mash, but that is hardly the least expensive feedstock for ethanol. I had given some thought to using wheat flour, and for this I would need a source for amylase enzyme (relevant data, but not the core question). I am now considering animal feed that I have access to for 20 cents per pound. This is a...
View full post »

Similar threads

Isomorphic mitosis
Replies
2
Views
2K
Medical How does chromosome number get halved in meiosis I?
Replies
1
Views
3K
What happens to a cell if a chromosome gets damaged
Replies
12
Views
5K
Are there duplicate genes in chromosomes and what role do they play?
Replies
5
Views
2K
Unicellular functioning molecules inside multicellular cells
Replies
4
Views
2K
Germline mutations are more harmful than mutations in somatic cells?
Replies
3
Views
1K
Genetics, replication of heterozygous diploids – conceptual
Replies
5
Views
2K
Which gene expressions start to happen in an embryo
Replies
1
Views
2K
Understanding Cell Division: Chromatin and Chromosomal Changes Explained
Replies
1
Views
1K
Interesting Path to Eukaryotic Cell Complexity Proposed
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top