Question

Down syndrome is a genetic disorder that is also called trisomy 21. A person with Down Syndrome has an extra copy of chromosome 21. Which best describes the genetic mutation that results in Down syndrome.

Nondisjunction during meiosis, resulting in uneven distribution of chromosomes

Complete duplication of chromosomes during polyploidy

Translocation during genetic replication, creating nonhomologous chromosomes

Crossing over during meiosis, leading to an exchange of genetic information

Answer 1

nondisjunction during meiosis\, resulting in uneven distribution of chromosomes

Step-by-step explanation: