1) If a person has sex chromosomes: XXY, what is their gender?
2) And if someone else has only sex chromosome: X, what is their gender? PLZ HELP ;)

1. Klinefelter syndrome

2. Nobody can be born with a single X chromosome

Explanation:

1. A genetic condition in which a male is born with an extra copy of the X chromosome

Klinefelter's syndrome isn't inherited, but rather occurs only as a result of a random genetic error after conception.

Males born with Klinefelter's syndrome may have low testosterone and reduced muscle mass, facial hair and body hair. Most males with this condition produce little or no sperm,

2. Sex chromosome occurs due to combination of the X and Y chromosome of both parents.

to this one it would be receptive field