Description: Inheritance of characters or traits occurs through basic units of heredity called genes. Each human cell consists of twenty-three pairs of chromosomes containing genes inherited from both biological parents. Of these, some genes are dominant, requiring only one copy to exert their effects, while others are recessive, requiring both copies to be in place to cause any changes. Aberrations in chromosomes on the whole or mutations in specific genes without chromosomal modifications... więcej

Salem Press Encyclopedia of Health, 2022. 3p.