Final answer:
Our DNA causes us to have physical traits through a process called protein synthesis. DNA contains the instructions for making proteins, which determine the structure and function of our cells.
Step-by-step explanation:
Our DNA causes us to have physical traits through a process called protein synthesis. DNA contains the instructions for making proteins, which determine the structure and function of our cells. The sequence of amino acids in a protein is determined by the sequence of nucleotide bases in the DNA. This sequence is transcribed into mRNA and then translated into a protein.
For example, if a gene in our DNA codes for a protein that produces melanin, which is responsible for pigmentation in our skin, hair, and eyes, then variations in that gene can result in different shades of skin color.
Overall, DNA influences our physical traits by directing the production of proteins that play a role in the development and functioning of our body.