A question about the inheritance of traits, there is a certain regularity in the inheritance of trai

Half of a person's genes come from their father, and the other half from their mother. As for the person's traits (e.g., skin color, hair color), it depends on the expression of genes. For example, in the face, if the expression of genes from the mother is greater than that of the genes from the father, the face will look like the mother.

It is possible that certain traits in a person are fixedly more affected by one parent than another. But this phenomenon (as you said, "the daughter looks like the father, the son follows the mother") needs to be verified by science. Functional genomics in the post-genomic era should provide the answer in the near future.

Another, I think, is that "cytoplasmic inheritance" has no scientific basis. During the embryonic period, there is no doubt that the fetus will be greatly affected by the mother. It should also be noted that the traits of offspring are the result of the combined effect of environment and heredity, and the later environment (such as the nutritional status of childhood) will greatly affect the skin color, body shape and other traits of people.

The so-called "daughters look like their fathers, and sons follow their mothers" just says that, how can daughters not be like mothers, and sons are like fathers in many ways. And because many traits are random, some children are a little more like their fathers, and some are a little more like their mothers.

Then there is the problem of sex chromosomes, because XY is different, and there is a difference between men and women like dad or mom.

But in general, it should be the same, and some may just be psychological factors that feel like which side.

As for the latter question, it should be similar to companion inheritance, and the child is born by the mother after all, and the physical and psychological influence of the mother during pregnancy is still relatively large.

Hereditary traits refer to all morphological characteristics, physiological traits, biochemical characteristics, metabolic types, behavioral instincts and pathological phenomena that can be passed down from generation to generation in an organism.

Traits are the morphological, structural, physiological and behavioral characteristics of organisms. Relative traits are different manifestations of the same trait. Hereditary traits are traits that are controlled by genes, and are all morphological characteristics, physiological characteristics, behavioral instincts, etc., which can be passed from parents to offspring in the form of DNA.

It is not the trait itself that is passed on from parent to offspring, but the genes that control the trait from parent to offspring.

The way in which human traits are inherited is divided into two main categories, monogenic inheritance and polygenic inheritance. Monogenic traits are controlled by a pair of genes, and the mode of inheritance conforms to Mendel's laws, such as blood type, DNA polymorphism, etc. Polygenic genetic traits are controlled by multiple pairs of genes, and are also affected by environmental factors, and the genetic laws are complex, such as human height, fatness, skin color, IQ, personality, behavior and appearance.

Heredity is divided into dominant inheritance and recessive inheritance, the so-called dominant inheritance, refers to a pair of genes only need to carry one dominant gene, instead of pairing, its determined traits will be manifested. The so-called recessive inheritance means that the genes that determine the expression of traits must exist in pairs, otherwise the traits affected by a single gene will only be hidden.

Eukaryotes. The genetic material is the chromosomes, the prokaryotes.

The genetic material is circular DNA in the nucleomime, and the genetic material of the virus is DNA or RNA, depending on which virus it is.

Chromosomes are genetic material made up of DNA and proteins, which are divided into autosomes and sex chromosomes.

Genes are segments of DNA that have a genetic effect, and there are many useless fragments on DNA.

The traits of organisms are jointly affected by genes and the environment, and the difference in environment will affect the expression of morphological traits.

Nucleic acids are the genetic material of all living things, and DNA is the main genetic material. Chromosomes are the main carriers of DNA, and genes are fragments of DNA that have genetic effects. Genes are arranged linearly on chromosomes.

Genes control protein synthesis and thus traits in living organisms.

Genetic material includes chromosomes, chromosomes are composed of gene segments and non-gene segments, and traits are the result of the interaction of different genes.

The similarity between offspring and parents is called heredity.

The differences between offspring and parents and between offspring are called variation.

Traits refer to the general term for the morphological, structural, and physiological characteristics of an organism.

Relative traits refer to different manifestations of the same trait in the same organism.