Answer:
hope this helps
Explanation:
About 95 percent of the time, Down syndrome is caused by trisomy 21 — the person has three copies of chromosome 21, instead of the usual two copies, in all cells. This is caused by abnormal cell division during the development of the sperm cell or the egg cell.
Answer:
One fertilizes the egg, and the other combines with the two polar nuclei.
Explanation:
Your answer would be B. Hope this helped :)<span />
It is C; to have fought over something trivial
