In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes?
$22$ pairs $+$ $XXY$ males
$22$ pairs $+$ $XX$ females
$22$ pairs $+$ $XXXY$ females
$22$ pairs $+$ $X$ females
Which of the following is not related to chromosomal aberration
Number of chromosomes in Down's syndrome are
An abnormal human male phenotype involving an extra $X$ chromosome $(XXY)$ is a case of
Who reported that Down’s syndrome is due to extra $21^{st}$ chromosome