Define aneuploidy. Name an allosomal hyperaneuploidy condition and mention its characters.

Explanation

Presence of an imbalanced set of chromosomes in the chromosomal complement of a cell is known as Aneuploidy.
Klinefelter.s syndrome is an allosomal hyperaneuploidy.
Symptoms :
(1). Gynecomastia ( Enlarged breast tissues).
(2). Small penis.
(3). Learning disabilites.
(4) Small firm testicles.
(5) Sexual dysfunction.
(6) Diminished pubic, axillary and facial hairs.