Down's syndrome involves
a. sex-linked trait, gene mutation, chromosomal abnormality

It involves chromosomal abnormality; when the condition is caused by trisomy 21, (down syndrome), the chromosomal abnormality occurs as a random event during the formation of reproductive cells in a parent. The abnormality usually occurs in egg cells, but it occasionally occurs in sperm cells.
I hope this answers your question. =)

No because males don’t have reproductive organs dummy

1. b vitamins2. vitamin k3. vitamin d4. examples are walnuts, seeds, tofu5.  total fat, saturated fat, trans fat, cholesterol, sodium, total carbohydrate, dietary fiber, sugars, protein, vitamin a, vitamin c, calcium, and iron.6. 11257. they have to contain reliable information8. less than 10%  9. i didnt read the course so im not surehope that : p