What are the types of variations? What is the composition of variation?

1.Deletion Deletion of a Segment of a Chromosome For example, meowing cat syndrome is a genetic disorder caused by a partial deletion of chromosome 5 in a person, named because the child cries softly, in a high-pitched voice, much like a cat meow. Patients with meow cat syndrome have distant eyes, low ear position, stunted growth and development, and severe intellectual disability; The formation of missing wings in fruit flies is also due to the deletion of a chromosome.

2.Duplication A chromosome adds a fragment The rod-eye phenomenon in Drosophila is caused by a partial duplication on the X chromosome.

3.Inversion A segment of a chromosome is reversed by 180 degrees, resulting in a rearrangement of the chromosomes, such as a female habitual miscarriage (inversion of the long arm of chromosome 9).

4.Translocation A segment of a chromosome that is transferred to another non-homologous chromosome or to a different region on the same chromosome, such as inertial leukemia (partial translocation of chromosomes 14 and 22, which is often the case with nightshade).

There are two kinds: heritable variants, non-heritable variants.

Non-heritable variation is caused by multiple environmental factors and cannot be passed on to future generations; Heritable variation is caused by genetic recombination and mutation of genes in an organism, which can be passed on to future generations and is the driving force of the evolution of an organism.

Chromosomal variations, gene mutations, genetic recombination.

There are genetic variations and non-genetic variations.

The failure of the variant refers to the exaggerated deformation of the design material, so that the picture presents a coarse cherry blossom shape and the space of change forms a contradictory effect.

Variation in statistics is universal, and variation in a general sense refers to the different manifestations of markers (including quality and quantity markers) between population units.

The difference between the attributes or numerical manifestations of a variable mark between units in the population is statistically called variation, which is variation in a broad sense, that is, it includes quality marks and quantity marks, and sometimes refers only to the difference between quality marks and units in the population.

Causes. The whole is homogeneous, for example, for all industrial enterprises in a certain area, its invariant signs are "a certain region" and "industry", and these two signs of rock imitation cluster have specifically defined the scope of the overall units; The overall unit often has different specific performances.

"Variation" is used to describe the difference in quality marks between different overall units under the same population, for example, when each employee of the industrial enterprise is the overall unit, gender is used to describe the variation of the quality mark of each employee (overall unit).

Heritable variation is one that is caused by changes in the genetic material (mainly DNA) and can be passed on to future generations. For example, dogs have different coat colors, goldfish are artificially selected by crucian carp, seedless watermelon (change in the number of chromosomes), albinism, hemophilia (genetic change).

Non-hereditary variation refers to those that are caused by environmental factors and cannot be passed on to future generations without changes in genetic material. For example, in the field staff's ** black bend chain, the wheat planted on the fertile land grows robustly.

According to the biological individual, it can be divided into favorable variants (such as dwarf mutations in wheat) and unfavorable variants (e.g., albino seedlings in wheat).

The designated mutations of Fantasy Journey to the West include mussel essence, merman, blue water yaksha, starfish, raccoon dog, and octopus.

Speaking interval: In order to ensure the normal order of chatting, the World and Rumors Mingranhong Channel has set a time interval for continuous speech, and after speaking in any one of the channels, the other channel must wait for the corresponding time before speaking.

Special Commands: In order to facilitate players to quickly release information, the game has set up some special commands that can be used when chatting.

Channel switching: Use the channel switching command to temporarily change the channel in which a message is sent without switching to the corresponding channel.

If Gang B chooses to fight, members can ask Jiang Daquan to send them to the "council room" for pre-war preparations. Only members who are level 30 and have been in the gang for at least 72 hours can participate in the gang battle.

If Gang B (Duanliang's defender) has Gang C, and the two sides have been aligned for more than 72 hours, after Gang B chooses to fight, Gang C members can also join the defending side to fight. Players are required to be level 30 and have at least 72 hours of joining the gang. The attacking team's allied gangs cannot participate in the battle.

Variation is divided into heritable and non-heritable variation, and heritable variation is further divided into mutation and intrabase.

As a result of recombination, mutations are divided into genes.

Accommodating mutations and chromosomal variations. Gene mutations are divided into base position mutations and frameshift mutations; Chromosomal variation is divided into chromosome number variation and chromosome structure variation, and chromosome structural variation is divided into addition, deletion, inversion, translocation, and inheritance is the transmission of genes, so that the offspring can obtain the characteristics of their parents.

There are genetic variations and non-genetic variations.

Genetic variation vs. non-genetic variation.