|
|
테두리
|
|
 |
YauCSlokHREGbbKMX |
 |
387 |
|
 |
| Will I have to work shifts? http://xxxnx.fun/sotry-xxz/ sotry xxz In a healthy person, almost every cell in the body carries 23 pairs of chromosomes, which hold nearly all of the genes needed for human life. But glitches in the early embryo can sometimes leave babies with too many chromosomes. Down's syndrome arises when cells have an extra copy of chromosome 21. |
|
 |
Juan |
 |
2020-04-09 04:21:38 |
|
|
|
|
|
|
|
|
|
