Chapter 6 Summary

The topics covered in this chapter can be summarized as follows:

  • Symbols are used to denote the alleles, or genotype, of a locus.
  • Phenotype depends on the alleles that are present, their dominance relationships, and sometimes also interactions with the environment and other factors.
  • A somatic mutation affects the individual but not the progeny, whereas a germline mutation affects the progeny in the next generation but not the individual in which they occur.
  • In a diploid organism, alleles can be homozygous, heterozygous, or hemizygous.
  • Allelic interactions at a locus can be described as dominant vs. recessive, incomplete dominance, or co-dominance.
  • Muller’s morphs classify all types of mutations including: amorph, hypomorph, hypermorph, neomorph, and antimorph.


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Introduction to Genetics Copyright © 2023 by Natasha Ramroop Singh, Thompson Rivers University is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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