Can DNA detect gender?

Most expectant mothers do not need to go to the hospital for DNA testing during pregnancy, but there are inevitably some special cases, that is, they do not know who the father of the child is. At this time, the only way is to do a DNA test and draw accurate conclusions through scientific methods. The current DNA paternity test has a very high accuracy rate. Women all want to know the gender of the fetus in their belly, so can DNA testing measure the gender of the fetus?

Can DNA detect gender?

Sex chromosomes, as the name suggests, are chromosomes that determine sex. In human reproductive cells, there are 23 pairs of chromosomes, or 46 chromosomes, of which 22 pairs are autosomes and 1 pair is sex chromosomes. The sex chromosomes of females are XX, and the genotype can be represented by 46, XX.

The male's sex chromosomes are XY and the genotype is 46,XY. Germ cells undergo two meiotic divisions, and the 23 pairs of chromosomes become 23. The egg contains only one sex chromosome, X, while the sperm can contain either X or Y sex chromosomes.

When the sperm and egg combine, the chromosomes of the fertilized egg return to 23 pairs. If the sperm containing an X chromosome combines with the egg, the fertilized egg is XX and develops into a female fetus;

If the sperm containing the Y chromosome combines with the egg, the fertilized egg will be XY and develop into a male fetus. Therefore, whether the baby is a boy or a girl depends on whether it is the X sperm or the Y sperm that participates in fertilization.

DNA gender identification is to find the free DNA separated from the blood sample and secreted by the fetus. The laboratory makes 13-15 DNA markers. As long as the Y chromosome DNA marker is found in these 13-15 markers, it means that there is a boy. If the Y chromosome DNA marker is not found in the 13 markers, it means that the baby is a girl.

Non-invasive DNA can tell the gender of the baby.

Non-invasive DNA mainly collects venous blood from pregnant women, extracts free DNA from the fetus, and uses gene sequencing technology to check the baby's gender. If the sex chromosomes of the fetus are XX, it is a girl, if they are XY, it is a boy. Therefore, non-invasive DNA can determine the gender of a baby with an accuracy rate of over 90%.

Can non-invasive DNA tell the gender of a man? What is non-invasive DNA?

The non-invasive DNA prenatal testing technology takes 5 ml of the pregnant woman's venous blood, sequences the free fetal DNA in the maternal peripheral plasma, and performs bioinformatics analysis on the sequencing results to obtain the genetic information of the fetus, thereby detecting whether the fetus suffers from the three major chromosomal diseases: trisomy 21 (Down syndrome), trisomy 18 (Edwards syndrome), and trisomy 13 (Patau syndrome).