Prophase-->Metaphase-->Anaphase-->Telophase
Answer:
The natural home or environment of an animal, plant, or other organism.
Explanation:
Explanation:
In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg.
In a small percentage (less than 5%) of cases, the extra copy of chromosome 21 comes from the father through the sperm.
In the remaining cases, the error occurs after fertilization, as the embryo grows.
