Substances that cause DNA mutations are known as mutagens, and mutagens that cause cancers are known as carcinogens. Particular substances have been linked to specific types of cancer. Tobacco smoking is associated with many forms of cancer, and causes 90% of lung cancer.
Human diploid cells have 46 chromosomes and human haploid gametes (egg and sperm) have 23 chromosomes. Retroviruses that contain two copies of their RNA genome in each viral particle are also said to be diploid.
A: The human male gamete, also known as a sperm cell, contains 23 chromosomes in total. Humans have 22 chromosome pairs as well as two sex chromosomes, for a ... Full Answer > Filed Under: Molecular Biology & DNA.