Final answer:
Malignant melanoma affects melanocytes, the pigment-producing cells in the skin. Childhood exposures to the sun can predispose individuals to this form of cancer due to the DNA damage caused by UV radiation.
Step-by-step explanation:
In malignant melanoma, the cells affected are the melanocytes, which are the pigment-producing cells in the epidermis. Melanoma is a type of skin cancer characterized by the uncontrolled growth of melanocytes.
Childhood exposures to the sun can predispose an individual to malignant melanoma because UV radiation from the sun can damage the DNA of skin cells, including melanocytes. This damage can lead to the development of cancerous lesions and the formation of melanoma.
It is important to protect the skin from excessive sun exposure by wearing sunscreen, protective clothing, and avoiding the sun during peak hours to reduce the risk of developing malignant melanoma.