Question

The unfertilised egg always has __________ chromosome
(a) X
(b) Y
(c) XY
(d) XX

Answer 1

Answer:

XY chromosomes..........

either X in females or Y in males.

Answer 2

The unfertilized egg always has (a) X chromosome.

• The unfertilized egg is a female gamete and hence a haploid in nature.
• Since the females have XX chromosomes, the gamete has X chromosome only.
• The male gamete, namely sperm, can have either X or Y chromosomes.
• The fertilization between the X or Y sperm with egg decides the sex of the child.
• The fertilized egg will contain XX chromosomes or XY chromosomes.
• The egg with XX chromosomes will develop into a female while the egg with XY chromosomes will develop into a male.