Choose correct answer.
$(i)$ Sickle - cell anaemia is controlled by three pairs of allele.
$(ii)$ Trisomy is chromosomal disorder.
$(iii)$ $47$ chromosome present in person whose having Turner's syndrome.
Failure of cytokinesis after ...$A$... stage of cell division results in an increase in a whole set of chromosomes in an organism called ...$B$...
A pregnant woman who has done aminocentesis test finds an extra Barr body in her embryo. The syndrome which is likely to be associated with the embryois
Down’s syndrome in humans is due to
Broad palm with single palm crease is visible in a person suffering from-