Why am I a girl?? – Germanium Zone

Question: Why am I a girl??
- Keywords:
  gender,
  human body
Asked by 1drawsome to Cathal, Daphne, Darren, Jon, Katherine on 13 Mar 2012.
- Daphne Ng answered on 13 Mar 2012:
  
  Gender is determined by chromosomes which are tightly coiled DNA. Females have 2 X chromosomes while males have 1 X chromosome and 1 Y chromosome. Gender is determined at conception when you were just a single cell formed from the union of sperm and egg. Sperm carry either the X chromosome or the Y chromosome whereas eggs only carry the X chromosome.
  
  Hence, it is by chance that you are a girl because you happened to receive 2 X chromosomes.

Question: Why am I a girl??