Science - Biology - Heredity

Gap-Filling Quiz

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   Cells      characteristics      Chromosomes      colour      development      environment      exercise      food      fungi      generation      genes      geneticists      genetics      hair      pairs      parents      proteins      sex      tissues      traits   
Heredity is the passing on of characteristics from one to the next. It is the reason why children look like their . The process of heredity occurs among all living things including animals, plants, bacteria and . The study of heredity is called and scientists that study heredity are called .
Through heredity, living things inherit from their parents. Traits are physical . You look like your parents because you inherited your and skin color, ear shape, height, and other traits from them.
are the basic unit of structure of all living things. Tiny biochemical structures inside each cell called carry traits from one generation to the next. are made up of DNA (deoxyribonucleic acid) and DNA contains genes. Humans have 23 of chromosomes in each cell, except for cells which have only 23 chromosomes.
Genes are like blueprints for building a house, except that they carry the plans for building cells, and organs. They have the instructions for making the thousands of chemical building blocks, called in the body. Differences in genes cause individuals to have different traits such as hair , blood type or skin colour.
A gene gives only the potential for the of a trait. How this trait develops depends partly on the . For example, a person may have a genetic tendency toward being overweight. But the person's actual weight will depend on such environmental factors as to what kinds of the person eats and how much that person does.