Which of the following genetic disorder is caused by the fusion of abnormal ova with normal sperm only:-

Q. What is the difference between klinefelter syndrome and homosexuality?
A person affected with klinefelter syndrome shows secondary characters of male or female???

Q. Which of the following is correct match?

I	II	III
A) Thalassemia	a) XO	i) Flat nose, simian crease
B) Down's syndrome	b) $42$AA$+$XY	ii) Webbing of neck
C) Turner's syndrome	c) $44$AA$+$XXX	iii) Anaemia, jaundice
D) Klinefelter's syndrome	d) $44$AA$+$XXY	iv) Tall thin eunuchoid

Q. What do the following genetic symbol stand for: AA, Aa.