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Down's syndrome is caused by an extra co...

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

A

`50%`

B

`25%`

C

`100%`

D

`75%`

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The correct Answer is:
A
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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

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Down's syndrome is due to trisomy of 21st chromosome caused by

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

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