Discover new information and insights with the help of IDNLearn.com. Our experts provide timely and accurate responses to help you navigate any topic or issue with confidence.

A person with trisomy 21 has an extra copy of chromosome 21. What happened during meiosis that caused the person to get three copies of chromosome 21 instead of two copies? a) nondisjunction b) genetic recombination c) crossing-over d) binary fission