Karyotype Worksheet for 14-Year-Olds: Practice Matching Chromosome Pairs & Identifying Trisomies

Instructions

Match the chromosome pairs by drawing lines between them in the karyotype below. Identify and label any trisomies or unusual features you notice.

Karyotype Chart

Number the chromosomes 1-46 as shown in the chart below, then answer the questions that follow.

Matching Exercise

Match the following chromosome numbers to their pairs:

1. Chromosome 1: _______
2. Chromosome 2: _______
3. Chromosome 3: _______
4. Chromosome 4: _______
5. Chromosome 5: _______
6. Chromosome 6: _______
7. Chromosome 7: _______
8. Chromosome 8: _______
9. Chromosome 9: _______
10. Chromosome 10: _______

Trisomy Identification

Examine the karyotype and answer the following questions:

What does it mean if there are three of a particular chromosome instead of two?
Identify which chromosome shows an extra pair in the karyotype above and write its number here:
What is the term for having an extra chromosome 21?
If a karyotype shows three X chromosomes, what might this indicate?

Bonus Question

What would you like to learn more about regarding chromosomes or genetic conditions?