Chapter 7: Introduction to Patterns of Inheritance

A photo of light purple pea flowers.
Figure 7.1 Experimenting with thousands of garden peas, Mendel uncovered the fundamentals of genetics. (credit: modification of work by Jerry Kirkhart)

Genetics is the study of heredity. Johann Gregor Mendel set the framework for genetics long before chromosomes or genes had been identified, at a time when meiosis was not well understood. Mendel selected a simple biological system and conducted methodical, quantitative analyses using large sample sizes. Because of Mendel’s work, the fundamental principles of heredity were revealed. We now know that genes, carried on chromosomes, are the basic functional units of heredity with the ability to be replicated, expressed, or mutated. Today, the postulates put forth by Mendel form the basis of classical, or Mendelian, genetics. Not all genes are transmitted from parents to offspring according to Mendelian genetics, but Mendel’s experiments serve as an excellent starting point for thinking about inheritance.

Search for Key Points in Chapter 8

Chapter 8 in Concepts of Biology: 1st Canadian Edition

License

Icon for the Creative Commons Attribution 4.0 International License

NSCC Concepts of Biology Copyright © 2021 by BCcampus; OpenStax; and NSCC is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

Share This Book