Yes.. Sure. Lesbians can bear children the same as non-lesbian women.
Without a doubt. Being a lesbian has nothing to do with the sex of a child. Despite your sexual preference making a child still requires an egg (from a woman) and a sperm (from a man). The egg carries the sex chromosomes that make her female, xx; while the sperm carries those that make him a male, xy. A female donates an x and a male donates an x or y, actually determining the sex the baby will be.
Depends. Women of any sexual orientation of child-bearing age may experience pregnancy and have biologic children. Sexual orientation does not direct the biologic ability to conceive.
Yes. Only if she gets pregnant or adopts.
Yes. Any woman of child bearing age can have a child, assuming she is otherwise healthy. Her sexual orientation is not associated with her fertility, rather her choice of partner in her relationships.
Equal chance. A persons sexual orientation does not change the gender chances of conception. The lesbian would need a male sperm donor to become pregnant. The sex chromosome of the sperm that fertilized the egg will determine the sex of the fetus.