I WONDER - What Are Chromosomes?

DNA, or deoxyribonucleic acid, is a long molecule that contains our unique genetic code, acting as a blueprint for organism development, survival, and reproduction. DNA is organized into genes, which are packed into chromosomes. Humans have 23 pairs of chromosomes, totaling 46. Each gene carries instructions that determine traits such as eye color and hair type.

What is DNA often compared to due to its role in organism development?

• A map

• A recipe

• A blueprint

• A puzzle

How many pairs of chromosomes do humans have?

• 25

• 24

• 23

• 22

What are the segments of DNA that carry specific instructions called?

• Proteins

• Cells

• Chromosomes

• Genes

Which of the following traits is determined by genes?

• Language spoken

• Height

• Favorite food

• Eye color

What is the total number of chromosomes in a human cell?

• 44

• 47

• 45

• 46