Answer: it is probably a plant cell because it has a cell wall and chloroplasts.
Hello I have found the following Prefrontal cortex hope this helps
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.
the answer is A because A always goes with T
