Mental retardation in man associated with sex chromosomal abnoramlity is usually due to inrease in :

Mental retardation in man, associated with sex chromosomal abnormality is usually due to

Mental retardation in man, associated with sex chromosomal abnormality is usually due to

Mental retardation in man, associated with sex chromosomal abnormality is usually due to

Mental retardation in man associated with sex chromosomal abnormality is due to

Name the sex chromosomes in man.

Mental retardness in man occur due to :

Mental retardness in man occur due to :

In Down syndrome , karyotyping has shown that the disorder is associated with trisomy of chromosome number 21 usually due to:

In Down syndrome , karyotyping has shown that the disoeder is associated with trisomy of chromosome number 21 usually due to: