A disease caused by an autosomal primary non disjunction is
Klinefelter’s syndrome
Turner’s syndrome
sickle cell anaemia
Down’s syndrome.
Physical, psychomotor and mental development is retarted in an individual affected with
Condition of sex chromosomes in a male child of Down's syndrome will be
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
Broad palm with single palm crease is visible in a person suffering from-
In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes