Are genetic mutations scary? Are genetic mutations mostly harmful?

It's not scary at all, because genetic mutations are a frequent occurrence in nature, and it is the existence of genetic mutations that has produced so many species on the planet. But the genetic mutations of some viruses are more terrifying, and you can ** After this disease, some mutations occur in the genes of the virus, and you can't do anything about it.

Mutations are ubiquitous, because the number of animal somatic cells is very huge, the mutations of most cells will not have much impact on animals, and there are large areas of non-spinning code areas in the DNA of eukaryotes, and mutations occur in the non-coding region It has no effect on animals, so most of the mutations have no effect on animals, only a very small number of mutations will affect the physiology of animals, and the harm of this mutation is generally relatively large, and the probability of disability, teratogenicity and lethality is relatively high. But it is not excluded that a few parts of this few mutations are beneficial to animals, so such animals will be more adapted to the environment, and after a long period of adaptation and accumulation, the animal will form evolution.

Some things have changed very scarily, and some have not changed in life.

I think it's a rule, but it's relatively stable, because it's a mutation, that is, it's not very likely.

Since it's relative, there's no need to put your energy into it, so there's no need to panic too much.

Page 116 talks about mutations, while the Shanghai college entrance examination talks about genetic mutations, and mutations are not the same as genetic mutations.

A genetic mutation is a sudden big change in a gene that would otherwise be normal.

A sudden change in the structure or combination of genes on a chromosome is called.

Mutation. As a result of mutations, changes in the appearance and behavior of plants and animals may occur. Mutations can occur in any cell of an organism, and mutations that occur in germ cells have the greatest impact because the mutated substances they cause will carry over to the next generation.

Most mutations are harmful and cause the death of plants or animals in the early stages of development. But some mutations are advantageous and will be passed down from generation to generation. This is one of the ways in which biogenesis evolves.

An individual plant or animal that has undergone a mutation is called a mutant.

External physical factors: X-ray, laser, etc.

Chemical factors: nitrous acid and base analogues, etc.

Biological factors: viruses and certain bacteria, etc.

In the process of intrinsic DNA replication, the number, sequence, and type of deoxynucleotides inside the gene are locally changed, thus changing the genetic information.

What is the concept of a genetic mutation.

Gene mutation: A change in the structure of a gene caused by the addition, deletion, or alteration of base pairs in a DNA molecule.

There are many causes that can be broadly divided into three categories.

Physical factors: X-ray, laser, ......

Chemical factors: Nitrous acid, base analogues, ......

Biological factors: viruses, bacteria, ......