What is an Oocyte

Question

What is an oocyte?  
A) Haploid animal egg
B) Immature sperm
C) Polar body arising from mitosis of the egg
D) Immature, diploid animal egg
E) Haploid germ cell

Accepted Answer

An oocyte is an immature, diploid animal egg, which means it contains two sets of chromosomes, one from each parent, before it undergoes meiosis to become a mature, haploid egg.