The child afflicted with Down's syndrome has

The child affected with Down's syndrome has

Down's syndrome is due to

Down's syndrome is due to

Down's syndrome is due to

Down's syndrome is due to

A mother is afflicted by Down's syndrome caused by an extra copy of chromosome 21 Father is normal percentage of offspring affected by the disorder would be (a) 1 (b) 0.75 (c) 0.5 (d) 0.25

What is Down's syndrome ?