Instructions
Directions: Complete the following activities to learn about trisomy. Write your answers in the spaces provided.
Section 1: Chromosome Matching
Match the chromosome number to its name by drawing a line between them.
1. Chromosome 21___________________________________
2. Chromosome 18__________________________________
3. Chromosome 13__________________________________
Section 2: True or False
Circle "T" for True or "F" for False.
1. Most cases of trisomy occur due to chromosomal nondisjunction during meiosis. (T/F)
2. Trisomy 21 is also known as Down syndrome. (T/F)
3. Trisomy always results in severe health complications. (T/F)
Section 3: Fill in the Blank
Complete the following sentences with the correct term.
1. Trisomy occurs when there is an extra copy of chromosome number ______.
2. Trisomy 21 is the most common chromosomal disorder, affecting approximately ______ in 700 births.
3. Some common features of trisomy 21 include a flat face, a short neck, and ______.
Section 4: Thinking Activity
Write your answer to this question:
Explain why trisomy can be serious for an individual's health.
Section 5: Draw and Label
Draw a picture of a cell with trisomy 21 and label its key features. Use the space below to sketch your drawing and provide a brief description.
Answer Key
Section 1: 1. Chromosome 21, 2. Chromosome 18, 3. Chromosome 13
Section 2: 1. T, 2. T, 3. F
Section 3: 1. a specific number, 2. 1, 3. protruding tongue