Is the Y chromosome of the whole family the same, Zhihu?

Most of the Y chromosome comes from the male parent, but a small part may also come from the recombinant female parent X chromosome. Therefore, it cannot be said that the male Y chromosome is exactly the same as the paternal line. In addition, there are a lot of repetitions and palindromes on the Y chromosome, and basically no chromosome recombination will occur, so the variation is normal.

There are pseudoautosomal domains containing 16 gene at both ends of Y chromosome, which can be homologous recombination with X chromosome. This homologous recombination process is necessary for male fertility, and the failure of recombination will lead to male infertility.

Extended data:

Precautions:

Matters needing attention in chromosome examination, it is recommended to go to a regular big hospital for examination, and the result is more accurate. If the chromosome is abnormal, it is easy to cause infant malformation or miscarriage, and the chromosome abnormality cannot be cured.

If you plan to get pregnant, it is recommended to be a test-tube baby, which can prevent the baby from having genetic diseases. Pay attention to rest during pregnancy and strengthen diet and nutrition. At the same time, it is recommended not to stay up late and not to touch radioactive things, so as not to affect the baby.

Baidu encyclopedia -Y chromosome