Biology - Polygenic inheritance
For many characteristics, a number of genes (and all of their possible
alleles) have an effect on a particular phenotype rather than just one
gene. This is polygenic inheritance and is responsible for continuous
variation  seen in some traits  - for example human height, where a
number of genes on different chromosomes contribute to a continuum or
gradual variation of phenotypes. Characteristics that have an either - or -
phenotype show discontinuous variation.
Previous | Next
Log in to save your progress and obtain a certificate in Alison’s free Advanced Biology 2 online course
Sign up to save your progress and obtain a certificate in Alison’s free Advanced Biology 2 online course
Please enter you email address and we will mail you a link to reset your password.