Question

Down syndrome occurs when an individual has a mutation of chromosome 21. In what organelle does this mutation occur? A)cell wall B)genes C)mitochondria D)Nucleus​

Answer 1

D) your dna is held in the nucleus and therefore would occur in the nucleus

Answer 2

Answer: B

Explanation: A chromosome is a long strand of DNA. Your DNA is the sequence that holds the "info" to make a gene.