A question about chromosome mutation - Click for question?

Question

How exactly does a chromosome mutation occur and why is it harmful to the organism in which they take place? (Like what really happens?)

Answer 1

A chromosome mutation is a mistake that happens when the cell is dividing. Some mutations have no effect, but most chromosome mutations will be harmful rather than helpful. If you think about it, evolution has had eons to gradually improve and improve and improve the genetic makeup of a species. A random change is not likely to be an improvement, though it could possibly be an improvement.

Chromosomal mutations are of four main types. I didn't check to see if you are the same person who asked a similar question a bit ago, but the main kinds of mistakes are:
1. deletion = leaving out one or more base pairs
2. insertion = adding in one or more base pairs
3. translocation - moving a section of a chromosome over to another chromosome and hooking it onto the second chromosome which is the wrong place
4. inversion = taking out a piece of a chromosome, turning it around backwards, and sticking it back into the same chromosome

All of these are mistakes. The chromosomes are almost always copied correctly, but mistakes can happen. I just noticed that I put a hyphen instead of an equals sign in one of the parts above. I didn't mean to; it just accidentally happened. I could go back and fix it. And sometimes cells catch the mistakes and fix them. But I'm going to leave it like it is. And sometimes these mistakes stay in the cells. There are certain chemicals and types of radiation that make chromosomal and gene mutations more common. But the bottom line is that mutations are mistakes in copying or separating the DNA in a cell.

Answer 2

Chromosomal mutations take place when the number of chromosomes changes or when structural changes occur in the chromosomes. This process occurs generally during the formation of a zygote where changes in the number of chromosomes may result in fission (two into one or one into two) or fusion (two into one).

This site will go into more details for you :-)

Answer 3

Sickle cellular anemia is led to via a ingredient mutation in the DNA, the place one base is swapped for yet another. This motives a transformation in Beta hemoglobin whilst the RNA is translated. as a replace of the amino acid glutamic acid being extra valine is used as a replace. This motives the exchange in the form of the protein and motives sickle cellular anemia. that's no longer the effect of an addition, deletion, inversion.