Ask a question about genetic diseases, what are the genetic problems

Yes, it is cytoplasmic inheritance. Cytoplasmic inheritance is the mode of inheritance of traits controlled by the genetic material in the cytoplasm. Unlike nuclear inheritance, it does not follow the basic laws of heredity.

Traits controlled by cytoplasmic genes In heredity, the offspring always exhibit traits similar to those of the mother. The reason is that the genetic material in the cytoplasm of the fertilized egg comes from the egg cell, that is, the cytoplasm in the zygote comes from the mother, and the father does not provide the genetic material in the cytoplasm, but only the genetic material in the nucleus, and the male gamete has no effect on this trait.

For example, red-green color blindness, it is cross-genetic, and if the mother makes red-green color blindness, the son will also be. It is inherited dominantly on the X chromosome.

Yes, is maternally inherited, and its genes are in the cytoplasmic mitochondria.

Honey, glad to answer for you :)

I don't have the idea of making a will in advance for the time being.

Because I don't have enough money right now.

I can't understand the 30-year-old unmarried girl in the article, she is only 30 years old, she is not married, and now she has made a will, and her mother has never even held her grandson. If my mother saw the will, I don't think my mother would be happy.

But I've heard that don't persuade others to be kind without their suffering. I would have acquiesced to it, but I wouldn't have made a will in advance.

According to my analysis, is there too much pressure on the girls in the article, what kind of pressure will they face if they are unmarried at the age of 30? I'm not yet thirty years old, but I know that there is an old saying called "Stand at Thirty." In the face of various social pressures, the age of 30 may be more distressing than we imagined.

Why don't I make a will in advance? Because W is not enough one, the money has not been left for the family, the second one is too early, it doesn't feel very auspicious, no matter how to develop, you still have to consider the feelings of the other party, imagine that your parents will feel uneasy when they receive the news of your will early in the morning, and the will is not in a hurry, even if it is too late to write a will in the end, the special oral will is also valid. So I won't have the idea of making a will in advance for the time being.

Extended Material: Wills.

A will is a legal act in which a person leaves an estate to a family or other person's office in the manner prescribed by law during his lifetime, and only when he dies will trigger the legal effect.

Characteristics of a will: 1. A will is a unilateral legal act.

2. The testator must have full capacity for civil conduct.

3. The establishment of a will cannot be carried out**.

Fourth, in case of emergency, the oral form can be used.

5. A will is an act that takes legal effect only when the testator dies.

In the eyes of many people, heredity is a very magical thing. Many children look very similar to their parents, and even walk and have similar personalities. In addition, some children do not inherit the characteristics of their parents at all, and the emergence of these two situations makes many people feel that genes are really very mysterious.

In fact, more or less we will inherit the genes of our parents, and we will always have the shadow of our parents, so in what ways are parents easy to pass on to their children, and which genes are inherited from our fathers? What is inherited from the mother?

What traits do children inherit from their parents?

1.The child's appearance.

As a parent, we all want to know who our child looks like. In fact, it can tell you that parents jointly determine the appearance of their children, but due to the characteristics of genes, male genes are aggressive, which gives the father's genes the upper hand in determining the appearance.

2.Child's teeth.

Whether or not you have a white tooth is actually determined by the child's father. If the child's father's teeth are not good-looking, the child will be affected after birth in the future, but parents should not worry too much, because the child's teeth can be corrected the day after tomorrow.

3.The child's IQ.

The genetic fragment of IQ is in the X chromosome, which contains two X chromosomes in the female body due to the different chromosomes that males and females contain. Mothers have more influence on their children's intelligence, daughters' IQ accounts for half of their parents' IQ, and IQ inheritance is generally about 40 percent.

4.Weight.

Nowadays, people pay more attention to their body shape, and their entities are also affected by genetics. However, for parents to be overweight, the gene is easy to pass on to children, research experiments have proved that the child's weight is greatly affected by the mother, and the father's fat and thin has nothing to do with the child, if the mother is thinner, the child will become very slim in the future.

5.Height.

Height is the entire appearance of the child, height and face are equally important, for the height of the child, the father has a greater influence on the child. It is found that if the father's height is higher, the child will generally be very tall, in fact, the height is greatly affected by the acquired lifestyle habits, and the height can be greatly improved through exercise.

Summary. If the child can selectively inherit the advantages of the parents, of course, it is better, but there are some special circumstances, as parents to look at it correctly, in fact, some bad habits also have an impact on the appearance of the child. The height and weight of the child can be artificially controlled.

As long as the meal arrangement is reasonable, the child's weight can be controlled within a reasonable range.

Hello, please be sure to figure out what kind of cancer it is, it's very important.

It is true that some cancers have a familial clustering or familial hereditary predisposition, and it is also possible that the genes in the family have a certain susceptibility to certain cancers. Judging from the situation you mentioned, it seems that men are good at hair, and maybe women are not good at hair. So please figure out what kind of cancer it is, and the pathogenesis of each cancer is different.

Nasopharyngeal carcinoma has been reported in familial clusters in the United States and Eastern countries, and the accumulated evidence strongly suggests that the tumor is the result of a combination of familial genetic predisposition, environmental factors, and EBV (Epstein-Barr virus) infection. In particular, the expression of EBV (Epstein-Barr virus) is presumed to be required in the initiation stage of the tumor, but it is necessary to induce precancerous lesions and maintain the malignant phenotype of the tumor, which requires abnormalities in key cellular genes, i.e., inherited genes. (The above is an excerpt from Ackermann Surgical Pathology).

Nasopharyngeal cancer is more common in men than in women, and it is also associated with smoking.

At present, routine premarital examinations will not routinely check for cancer susceptibility genes, but will only detect major genetic diseases that affect the birth of offspring.

Attention conditions:1Only one pair of alleles per pair of chromosomes is considered;

2.All from a single parental breed.

Analysis: There are 8 chromosomes in the fertilized egg of Drosophila, 4 from the female parent and 4 from the paternal parent, when the fertilized egg becomes an adult, and the adult produces gametes", the useful information is: 8 chromosomes (4 pairs) produce gametes. Everything else is nonsense (interfering with information).

A pair of alleles on a pair of chromosomes, the total number of gametes containing all gametes from one parent is 1 2 (aa and aa);

Then the total number of gametes produced by 4 pairs of chromosomes all from one parent is (1 2) to the fourth power, i.e. 1 16. Complete.

1.Red-green color blindness is inherited with x recessiveness. That is to say, the mother's genotype in this couple is XBXB, while the father is XBY, and the child is XXY, and it is impossible to have XB gene inherited from the father, so the ** can only be obtained by the mother.

2.The paternal genotype is XBY, and the mother's genotype is XBXB, and the son is not color blind, then the genotype is XBX-Y, where Y and XB can only be inherited from the father, and only the XB gene can be obtained from the mother, so the son genotype is XBXBY, so the extra X chromosome can only be inherited from the father.