Chromosomes, DNA, and Genes
Every cell in your body, except red blood cells and sex cells (sperm or egg), contains a full set of 23 chromosome pairs like those shown in the photo on the far right. These 23 chromosome pairs contain the full blueprint for you as a complete, unique person. The primary component of each chromosome is a single, tightly wound molecule of DNA. Within that DNA are around 21,000 genes, each determining specific traits such as hair texture. Note the sex chromosomes (X and Y) on the lower right, indicating the sex is male.
Every cell in your body, except red blood cells and sex cells (sperm or egg), contains a full set of 23 chromosome pairs like those shown in the photo on the far right. These 23 chromosome pairs contain the full blueprint for you as a complete, unique person. The primary component of each chromosome is a single, tightly wound molecule of DNA. Within that DNA are around 21,000 genes, each determining specific traits such as hair texture. Note the sex chromosomes (X and Y) on the lower right, indicating the sex is male.
CNRI/Science Source