Glossary with audio assistance
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specialized germ cell. Either sperm or ovum. Contains the haploid (n) number of chromosomes.
the movement of gases between an organism and its environment; often takes place across a specialized surface, for example the alveoli of the lungs
Inflammation of the stomach
harmful effects of X-rays which affect the genes of the reproductive cells
the science of inheritance. Physical characteristics and abilities are largely determined by ‘genetic makeup’. In the 1860s, Mendel carried out studies which showed that each organism has physical traits which correspond to invisible elements within the cell.
the genetic make-up of an animal
Elderly; the term is often used when an animal reaches or exceeds 75% of its expected lifespan
the period of development of the young from fertilization to birth