Answer:
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.
<span>B. The have been Earth's only hominine for the last 24,000 years.
After the unknown eradication of the Homo Neanderthals, Homo Sapiens became the only homonine for the last 24,000 years. That is to say, that modern humans are the result of the evolution of homo sapiens to homo sapiens sapiens.</span>
Variables is likely the correct answer.
