Genetics - Chapter 2

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4 Cards. Created by Shelby Lynn ().

Gregor Mendel

First scientist to understand heredity, conferring genetic laws about the appearance/disappearance of traits in different generations.


Basic units of heredity, passed from one generation to the next. Genes are the source of every heritable trait.


The way that genes transmit traits from parents to offspring.

Themes of Mendel's work

  1. Variation is widespread in nature - allowing continuously evolving diversity.
  2. Observable variation is essential for following genes from one generation to the next.
  3. Variation is inherited by genetic laws - can explain why like beget like and unlike.
  4. Mendel's laws apply to all sexually reproducing organisms.

Artificial selection

First applied genetic technique. The purposeful control of mating by choice of parents for the next generation.