Information on genetic variation

It's in the genetic algorithm"Heredity""Variation"?

Genetic variation refers to the differences at the DNA level between different individuals in the same gene pool on the basis of heredity, also known as "molecular variation", and is also a qualitative or quantitative description of genetic differences between individuals of the same species.

The phenomenon that the parents of an organism can produce offspring similar to their own is called heredity, and there are always more or less differences between parents and offspring, and between individuals of offspring, and this phenomenon is called variation. Heredity refers to the similarity between parents and children, and variation refers to differences between parents and children and between offspring. The heredity and variation of living things is achieved through reproduction and development.

Some variations in living things are heritable and some are not. Heritable variation refers to the variation that an organism can pass on to its offspring, including genetic recombination, genetic mutation, and chromosomal variation. This variation is caused by changes in the genetic material.

Non-heritable variations are variations caused by external factors and are not passed on to future generations.

Heredity and variation are one of the fundamental characteristics of living things. Heredity usually refers to the phenomenon of similar traits between parents and children in the process of propagation. In genetics, heredity refers to the intergenerational transmission of genetic material, and the ability of parental traits to be passed on to offspring through genetic material is called heritability.

Variation generally refers to differences in traits between parents and offspring and between their offspring. Trait variation caused by changes in genetic material can be passed on to offspring. An organism's ability to produce variations in traits is known as variability.

The phenomenon in which the parents of an organism can produce offspring similar to their own is called heredity. The basis of genetic material is deoxyribonucleic acid (DNA), and parents pass on their own genetic material DNA to their offspring, and the inherited traits and species remain relatively stable. The reason why life can continue from generation to generation is mainly due to the fact that the genetic material is passed down from generation to generation in the course of biological processes, so that the offspring have traits similar to those of the previous generation.

A few rounds of groin in the glory of the times.

Heredity and variation refer to the phenomenon of similarities and dissimilarities between the parents and offspring of an organism. The different types of expression of the same trait in an organism are called relative traits, and this trait can be stably passed on to offspring. One of the essential differences between living and non-living things is that living organisms are capable of self-replication, thus constituting a continuous system of life.

The different types of expression of the same trait in an organism are called relative traits, and this trait can be stably passed on to offspring. One of the essential differences between living and non-living things is that living organisms are capable of self-replication, thus constituting a continuous system of life. Heredity is the phenomenon of offspring repeating the characteristics and characteristics (traits) of their parents in this continuous system, and its essence is the genetic material that is produced by the parents and brings to the offspring to develop according to the traits of the parental genes.

The same genes stipulate that the organism develops the same traits, so it is hereditary, reflecting the stability of the biological world. However, this stability is relative, because the structure of genes will inevitably change at one time or another during the long-term development of generations. Structurally altered genes cause the organism to develop different traits from those before the change, and variations (heritable variations) appear.

Heritable variation gives new content to heredity, and also enables the continuous development and evolution of the long life continuum of living things. Without heredity, it is impossible to maintain the relative stability of traits and species; Without variation, no new traits will be produced, and there can be no evolution of species and selection of new varieties.

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 of the best black, the wheat planted on the fertile land grows vigorously.

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).

1.Heredity simply refers to the selection of existing genotypes in the parent's genes and the recombination of new expressions, while variations include those obtained directly from the parents and their own.

2.Genetics is mostly species-neutral, i.e., there is no harm and no benefit. But variation is far more bad than good for most species, most variation is bad for species, and only a few are good for adaptation to environmental factors.

3.Heredity is the basic attribute of all living things, it keeps the biological world relatively stable, so that human beings can identify the biological world, including themselves. Variation refers to differences between parental generations, siblings, and individuals of the same species.

4.Heredity is a phenomenon of similarity between parent-child generations, as the saying goes"Plant melons and get melons, plant beans and get beans"。Its essence is that organisms obtain substances from the environment according to the development pathways and methods of their parents, and produce copies similar to those of their parents.

Variation mainly refers to genetic mutations, genetic recombination, and chromosomal variations. Among them, genetic mutation is the root of the genes of new organisms, that is, the root of biodiversity.

In terms of "hereditary" and "child-like fatherhood", children are very much like their parents. However, if we look closely, we will find that daughters, although they resemble their mothers, are not identical; Maybe her mouth is less like her mother and more like her father.

The son's nose is high, like his father, but his eyes are like his mother's. There are also children who are not like their fathers or mothers, but rather like uncles. Between parents, children, brothers and sisters, it has never been found that two people are exactly the same, and that their siblings are similar and different.

There is an old saying in my country: "A mother gives birth to nine sons, and even a mother has ten likes." "Even twins are easily identified by their parents, and even around us, we can see normal sighted parents, but they are born with a high degree of myopia.

daughter's come. This phenomenon of discrepancies between parents and offspring, as well as between individual offspring, is called variation.

Heredity and variation are common phenomena in the biological world, and they are opposites and unified. In human beings, heritability maintains the constancy of the morphological and physiological characteristics of human beings, so that human beings can reproduce from generation to generation, and under certain conditions, mutation changes the characteristics of the species, so that it can continue to move forward and develop. Generally speaking, most of the variations in human beings are within the normal range of life activities, and these variations are consolidated and re-inherited in the offspring.

Without variation, the biological world loses the conditions for progress and development, and heredity can only be a simple repetition; Without heredity, variation cannot accumulate, it loses its meaning, and organisms cannot evolve.

What is heredity and variation.