There are several distinct stages during the process of human reproduction and development. Five of these stages are listed below in alphabetical order:

baby, embryo, fetus, gametes, zygote

List these five stages in the correct chronological order in which they occur, starting with the earliest stage.

The sex chromosomes in the cells of a biological mother are $XX$. The sex chromosomes in the cells of a biological father are $XY$.

1. State the sex chromosomes present in the body cells of their female fetus.
2. State the total number of chromosomes found in a normal, healthy diploid body cell of this fetus.