28 окт. 2024 г. · Down syndrome is a genetic condition where a person is born with an extra chromosome. This can affect how their brain and body develop. People ...

16 февр. 2024 г. · Down syndrome is caused by a random error in cell division that results in the presence of an extra copy of chromosome 21.

31 янв. 2023 г. · Down syndrome is a genetic condition where a person has an extra copy of chromosome 21 for a total of 47 chromosomes instead of 46.

Down syndrome occurs when an individual has a full or partial extra copy of chromosome 21. This additional genetic material alters the course of development.

Down's syndrome is when you're born with an extra chromosome. You usually get an extra chromosome by chance, because of a change in the sperm or egg before you ...

Down syndrome or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.

23 февр. 2024 г. · People with Down syndrome are born with an extra chromosome. This can lead to a range of issues that affect them mentally and physically.

20 окт. 2023 г. · Down syndrome is a genetic disorder caused by an extra full or partial cell division of a human's chromosome 21, resulting in lifelong ...

Causes. In most cases, Down syndrome occurs when there is an extra copy of chromosome 21. This form of Down syndrome is called trisomy 21. The extra chromosome ...