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? (a) 100% (b) 75% (c) 50% (d) 25%

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?
(a) 100% (b) 75%
(c) 50% (d) 25%
by

1 Answer

Answer :

(c) 50%
by

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