Xx - female. Xy - male. egg already has an X chromosome so it depends on the other. If second one is X than it's a girl. If Y - a boy
Reproduction? I could be wrong though
Technically A and B, but A is more true, so it is the 'correct' answer.
Answer:
the first answer that is there a cell with half the chromosome number of the parent cell
We group artworks with similar characteristics into periods or styles because it is easiest to do it that way - this way we can find common characteristics in these literary/artistic eras, and name them. For example, the Renaissance had a distinct style, which differs greatly from that of Romanticism.