Answer:
Yes, they do it to make you scared of what they are capable of but at the same time you need to keep in mind that their goal is to startle you and make you fear them
Explanation:
It involves chromosomal abnormality; w<span>hen the condition is caused by trisomy 21, (down syndrome), the </span>chromosomal abnormality<span> occurs as a random event during the formation of reproductive cells in a parent. The </span>abnormality<span> usually occurs in egg cells, but it occasionally occurs in sperm cells.
I hope this answers your question. =)</span>