Final answer:
The correct answer is Trisomies. Trisomy is a type of aneuploidy that occurs when there is an extra copy of a chromosome, resulting in three copies instead of the usual two. In the case of Down syndrome, individuals have three copies of chromosome 21, known as trisomy 21.
Step-by-step explanation:
The correct answer is D) Trisomies.
Trisomy is a type of aneuploidy that occurs when there is an extra copy of a chromosome, resulting in three copies instead of the usual two.
In the case of Down syndrome, individuals have three copies of chromosome 21, known as trisomy 21.
The incidence of trisomies, including Down syndrome, increases with the age of the mother.