Interactions: Genes and the environment

Question 1

operon

Answer 1

a unit consisting of linked genes which is thought to regulate other genes responsible for protein synthesis

Question 2

discontinuous variation

Answer 2

phenotypic features which are either present or not, usually inherited on one or at most a small number of genes.

Question 3

continuous variation

Answer 3

phenotypic features which show a huge range of values; they are usually polygenic and are also affected by environmental factors