4. What would likely be the gender of a child if a sperm having X chromosome fertilize
an egg?
(a) A girl, as the unfertilized egg has one X chromosome.
(b) A girl, as the unfertilized egg has one Y chromosome.
(c) A boy, as the unfertilized egg has one X chromosome.
(d) A boy, as the unfertilized egg has one Y chromosome.