Down's syndrome is caused by the presence of extra chromosome number

Mangolism is a genetic disorder which is caused by the presence of an extra chromosome number.

Down's syndrome is caused by an extra copy of chromosome number 21. what percentage of offspring produced by an affected mother and a normal father would be affected by this disorder ?

Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder

Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder

How Down.s syndrome is caused?

Down's syndrome in caused by an extera copy of chromosome number 21 . What percentage of offspring is produced by an affected mother and a normal father .