Mental health and dementiaQuestion 683 of 1700

A baby is typically born with how many chromosomes?

  1. 21
  2. 23
  3. 46
  4. 64
Show answer

Correct answer: 46

A typical baby has 46 chromosomes. In Down syndrome there is one extra copy of chromosome 21.

Source: Nursing Assistant (Reuter), 10.3: Caring for Clients With Developmental Disorders

Practice mental health and dementia

Questions last reviewed: 18 October 2026