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1. Blood test is the quickest way to know the sex of the fetus. But at present, there is no technology to know fetal sex through blood test in China. The latest place to have this technology is Hong Kong. Researchers have found that a gene called "SRY" only exists on the Y chromosome. Once it is detected, it means that the fetus is male. So we can isolate the fetal DNA from the mother's blood to see if we can find the SRY gene, and the gender question will be solved naturally. Different from B-ultrasound, which can only observe gender characteristics when the fetus is big enough, this method can be performed 7-8 weeks after conception, and the accuracy rate is 99.4% higher than B-ultrasound
however, it should be noted that the following conditions must be met for blood fetal sex identification: gestational age over 8 weeks, no male fetus delivered within one year, no blood transfusion, major operation, organ transplantation within one year, and the blood type is the common popular blood type. Otherwise, the accuracy of blood test will be greatly reced.

2.

Yes

there are three methods for gene detection

1. Biochemical detection

biochemical detection is to detect blood, urine, amniotic fluid or amniotic membrane cell samples by chemical means to check whether there are related proteins or substances and determine whether there are gene defects. It is used to diagnose a genetic defect, which is caused by the imbalance of some proteins that maintain the normal function of the body. It is usually used to test the protein content. It can also be used to diagnose phenylketonuria

2. Chromosome analysis

chromosome analysis directly detects the abnormality of chromosome number and structure, rather than the mutation or abnormality of a gene on a chromosome. Usually used to diagnose fetal abnormalities

the common chromosomal abnormality is one more chromosome. The cells used for detection are from blood samples. In the case of fetus, the cells are obtained by amniocentesis or chorionic villus sampling. Stain it to make the chromosomes stand out, and then use a high-power microscope to see if there is any abnormality

DNA analysis is mainly used to identify genetic diseases caused by single gene abnormality, such as Huntington's disease. DNA analysis of cells from blood or fetal cells

extended data

in theory, people can find out their risk probability of suffering from various diseases in the future through genetic testing, and let the data speak. Because behind all appearances, genes are "making trouble". Understanding genes can help us understand our bodies. For example, if you want to know how much you drink, just check the mutation rates of two genes, ADH1B and ALDH2

the alcohol that people drink is absorbed by the body from the mouth. After that, alcohol needs to be metabolized into acetaldehyde, then acetic acid, and finally carbon dioxide and water. The first step is directed by ADH1B and the second step is led by ALDH2. Without any of them, the alcohol metabolism in the liver will have problems, and the alcohol that can't be metabolized will settle in the liver and cause it to become alcoholic liver

The reason is that the mutation rate of ADH1B and ALDH2 in Asians is as high as 98.5% and 9% - 40% respectively. People with these two genetic defects can't drink. The so-called amount of alcohol they practice only improves the body's tolerance, and the damage is still there

Except for the amount of alcohol, genes determine everything we do. The human body is composed of cells, and the activities of each cell are governed by the genes in the nuclear "headquarters". It's genes that determine our height, eye size, fatness, blood type, brain circuit length, loud or quiet, smart or stupid, as well as skin color, toenail shape, hip size and whether we eat or not

3. Different people may have different choices e to different sources of information. However, from the comprehensive evaluation of the exhibitions I participated in, Jiaxue gene's genetic testing is better. First, all testing items: Jiaxue gene can test complex gene testing items through oral mucosa. The testing items of Jiaxue gene include decoding of gifted genes, decoding of 36 tumor risk genes, decoding of 150 major diseases, decoding of 150 common diseases, decoding of infertility genes, decoding of perfect baby genes, decoding of molecular typing genes of tumor and common diseases, 100 drugs guide gene decoding; Second, good service attitude; Third, the staff have comprehensive knowledge of gene decoding, gene interpretation and gene information consultation.

4. Dai Xueliang from Luohu port. Hit 147 --- i645_ About 170z

5. Some genes can be detected by blood tests.

6. Dial (oo85z) - (958z) - (17-02) -- Dai Xueliang

7. The movie is called the Dark Knight
but "double faced man" is not the hero
he is one of the two main supporting actors.

8. The promotion of values, such as family, friendship, love, patriotism and so on, can easily arouse people's resonance; There is also a well-developed marketing system. One step films have some mature operation modes from shooting to distribution; With the continuous improvement of technology, there are many technology maniacs in Hollywood, such as James Cameron, Robert zeminsky, Peter Jackson and other computer stunt maniacs. Each work can give people a surprise. I'm looking forward to Cameron's masterpiece "God comes down to earth"
in many aspects, people's movies are really good. What do you want to see? What do you want to see? What do you want to see? What do you want to see? What do you want to see? What do you want to see? What do you want to do? What do you want to see? What do you want to do? What do you want, Art, and almost all the famous directors are going to Hollywood. Why do you think about it

9. You can take bus No.17 to Nanjiao Park, turn 901 or 122 to Bixiang street and walk for 20 meters!

10. Take 314 to Dongtang, then walk a little further