A genetic test reveals that a couple's child has a chromosomal abnormality. What is the term for the presence of an extra copy of a chromosome?
Q1. A genetic test reveals that a couple's child has a chromosomal abnormality. What is the term for the presence of an extra copy of a chromosome?
Answer: Trisomy
Explanation: Trisomy refers to the presence of an extra chromosome, such as in Down syndrome.