What is maternal inheritance 20 and what is maternal inheritance

Maternal inheritance: The crossing of two parents with relative traits, whether orthogonal or countercrossed, the offspring always behaves as a genetic phenomenon of maternal traits. Maternal inheritance is cytoplasmic inheritance.

Maternal inheritance refers to inherited phenomena controlled by extranuclear chromosomes.

Maternal inheritance refers to the crossing of two parents with opposite traits, regardless of orthogonal or incrossed, the offspring always behave as a genetic phenomenon of maternal traits. Cytoplasmic inheritance is matrilineal inheritance and is a genetic phenomenon controlled by extranuclear DNA (mitochondrial DNA and plastid DNA).

Simply put, it is cytoplasmic inheritance. It is the inheritance controlled by extranuclear chromosomes.

The phenotype of the offspring is determined only by the genotype of the female parent.

What is heredity and why children are similar to their parents.

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Analysis: Maternal influence is controlled by nuclear genes, and nuclear gene products accumulate in female gametes, so that the traits of offspring are manifested as maternal traits, such as the rotation direction of the shell of the conical snail is controlled by nuclear genes.

Maternal inheritance is caused by genes located in the cytoplasm of the filial piety number. Male gametes do not have cytoplasm, only female gametes have, male and female gametes combine to produce offspring, the cytoplasm is from the maternal parent, so the cytoplasmic genes (such as mitochondrial and chloroplast genes, are the first to exist in the maternal parent) The traits controlled by the mother always come from his mother, which is called maternal inheritance.

So, the difference between them is that the genes are located in different parts, one from the nuclear gene and the other from the cytoplasmic gene.

The similarity is that the offspring are similar to the mother's.

Similarities: the positive and negative results are different; The traits are maternal traits;

Differences: Maternal genetic phenotype of cytoplasmic inheritance is stable; Maternal influence of nuclear inheritance is phenotypically unstable.

In simple terms, a matural-Chinese genetic disease is a genetic disease that only the mother will pass on to the next generation.

However, it is important to note that only mothers can pass it on to the next generation, and it can be passed on to daughters or sons. So, it doesn't matter if you give birth to a girl or a boy, only girls will pass it on to the next generation.

For example, Xiao Ming's mother has a maternal genetic disease, Xiao Ming has a sister Xiaomei, Xiao Ming and Xiaomei both have a maternal genetic disease, but only the child of her sister Xiaomei will carry the genetic book, and Xiao Ming's child will not have the genetic disease.

Therefore, if the mother has a matrilineal genetic disease, it is safer for the offspring to have a son than a daughter.

1. It is forbidden for close relatives to marry

As we all know, no matter whether there is a genetic disease in the family or whether it carries a genetic disease gene, it is not possible to marry close relatives, and the probability of a genetic disease in the offspring of a close marriage is higher than that of a non-close parent, because the probability of two close relatives carrying the same recessive genetic disease gene is much higher.

Therefore, the first one should pay special attention to not marrying close relatives.

2. Premarital examination

Before two people get married, in addition to understanding each other and planning for the future together, they also need to have a good understanding of the family history of both parties, which is ignored by many people before marriage, or it is not easy to mention it consciously.

Knowing the family history of both parties is not to understand their development history and economic conditions, but to understand whether there are any patients or carriers of genetic diseases in at least three generations of both parties.

The purpose of understanding this is to have more insurance for the future before you get married. Sell at a loss.

3. Pre-pregnancy check-up and post-pregnancy physical examination

Pregnancy check-ups are essential, regardless of whether the parents have a genetic disorder or not.

According to the current level of medicine in China, hospitals in most regions can conduct comprehensive pregnancy tests, and most genetic diseases can be detected in the fetal period.

And these genetic diseases can only be detected by medical means, so pregnancy tests must be taken.

It should be noted that Zheng Guo has this genetic disease, and he must check his body clearly when he is pregnant, and he must also pay attention to protecting himself and the health of the fetus at ordinary times.

The genetic material in the human cytoplasm is located in the mitochondria, and the number of mitochondria in each cell is considerable, not just a few as in the book schema diagram. In addition, the number of mitochondria in a mitochondrial only affects the mitochondria themselves, so if a certain cytoplasmic genetic disease is manifested in the human body, the number of mitochondria with the disease-causing gene in its cells must reach a large number to make the disease trait manifest, otherwise it will be covered by a large number of normal mitochondria.

Both maternal and cytoplasmic inheritance are passed on to the next generation through DNA.

Differences: Maternal inheritance is cytoplasmic inheritance, which is the inheritance of DNA from mitochondria and chloroplasts to daughter cells. These organelles are unevenly distributed in cells, which may result in daughter cells being inherited and not being inherited.

This is an uneven inheritance. This allows one part of an individual's organs to manifest as one trait and another part of the organ to manifest as another. This is illustrated by the partial white-flowered leaves of jasmine.

Hello, I have seen your question, I am sorting out the answer, please wait a while [heart] Hello dear, I am honored to answer for you: according to genetics, it is all the same. The inheritance of genes is ** the 23 chromosomes of the father and the 23 chromosomes of the mother, which is half of the parents, but the inheritance of the genes is random.

So a daughter may have some characteristics like her father, some characteristics like her mother, or most of the characteristics are biased towards one of the parents.

Therefore, it is recommended that both parents should carry out genetic screening in advance when conceiving offspring, which can avoid genetic defects in offspring to a certain extent. In daily life, you can maintain healthy living habits and eating habits, such as doing moderate physical exercise, going to bed early and getting up early, eating a balanced diet, etc., try to avoid overeating, alcoholism, smoking and other bad habits, help maintain good health, and can also prevent genetic defects in germ cells to a certain extent, affecting the next generation.

Girls inherit their mother's genes and heredity, and daddy's genes are equally much, not more than their mother's genes.

I think in real life, a class of boys inherit their mother's genes, more girls inherit their mother's genes, and more father's genes, but there are also special circumstances, and there are also more inherited mother's genes.

Girls can inherit their mother's 55 to 60 genes, which is generally the case, but each individual has its own peculiarities, so this statement may not be 100% correct.

Generally speaking, girls inherit more genes from their fathers. Boys inherit more genes from their mothers, so many of them are that girls will be born more and more like their fathers, and boys will grow more and more like their mothers, and there is a character girl who will inherit her father's character.

From a biological point of view, only girls can carry on their ancestry.

Mitochondrial DNA survives much longer than DNA and is inherited from the mother, making it ideal for confirming family relationships.

"Mitochondrial DNA" is a genetic gene that is passed down only through the maternal line, and men can inherit "mitochondrial DNA" from their mothers, but cannot pass it on to their offspring. In other words, if a woman gives birth to all sons, her "mitochondrial DNA" genetic chain will be terminated. Sigkis, a professor of human genetics at the University of Oxford in the United Kingdom, said that "mitochondrial DNA" is generally difficult to change, and it takes an average of 20,000 years for "mitochondrial DNA" to undergo small mutations.

"Most modern Europeans have seven types of 'mitochondrial DNA,' just like blood type," he said. We believe that every person with the same 'mitochondrial DNA' is the offspring of the same woman tens of thousands of years ago. ”

Girls will inherit more genes from their fathers, and some will inherit fewer genes from their mothers.

Girls are generally inherited, and fathers have more genes. Especially the appearance, appearance, and personality will basically inherit a little more from my father.

If you give birth to a daughter. If you give birth to a daughter, in general. What he inherited from his parents was split in half. The probabilities are all the same, but. Some may be appearances, and some may be personalities.

This kind of thing is not absolute, and the genes inherited by the child are not necessarily the genes inherited from the mother.

And there are many genes of inherited mothers, well, this is not absolute, some children have more genes of their fathers in their lives, and some are inherited from their mothers.

From the point of view of genetics and cytology, theoretically, children inherit more from their mothers, and the genetic material of the fertilized egg is not only accidental in the nucleus, but also a small amount of genetic material in the cytoplasm, and the genetic material in these cytoplasms is provided by the egg cells provided by the mother. So theoretically, the genetic material the mother gives more.

In genetics, the genes of the war mother are only 30% 40. The operation of the father is still relatively large, so the girl's general appearance and personality are many with the father, and the girl is the father's little padded jacket.

Shouldn't I inherit more of my father's genes, anyway, my daughter Yes, few people say that they miss me, exactly the same as her father when he was a child, even the tongue is exactly the same, and I am different.

Girls will inherit more from their fathers, that is, boys will inherit more from their mothers, and it is generally the IQ of girls who inherit their fathers. If the boy is going to inherit more from the mother.

Do I come to girls to inherit more genes from their mothers?

I think there are a lot of girls, but there are also some girls whose mothers don't inherit a lot of genes, but their fathers inherit a lot.

Not necessarily, biologically the genetics are half of mom and half of dad. The day after tomorrow, depending on who the main caregiver is, the child's personality and behavior may be a little more like it.

Is there more genes in a genetically based mother? This is not necessarily, as a matter of course, I think you have more genes like your father anyway, because you can say something, and that special gene can only be inherited from your father.

It depends on who is more powerful in the genes between the husband and wife, and whoever has the stronger genes will inherit a little more. Of course, most of them are half of each parent, and there are also intergenerational inheritances.