The answer is B. 1,000,000 times
About 95% 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.
The answer is a. Charles Darwin
it is a variable (often denoted by x ) whose variation does not depend on that of another.
The answer for this question is pairs of nitrogen bases
