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Practice Listening: Highlight Correct Summary
ID: #34638
Medium
Gregor Mendel
Transcript:
Knowledge of the inheritance of characteristics has been implicitly used since prehistoric times for improving crop plants and animals through selective breeding. However, the modern science of genetics, which seeks to understand the mechanisms of inheritance, only began with the work of Gregor Mendel in the mid-19th century. Although he did not know the physical basis for the heredity, Mendel observed that inheritance is fundamentally a discrete process where specific traits are inherited in an independent manner. These basic units of inheritance are now called genes. Although genetics plays a large role in determining the appearance and behaviour of organisms, it is the interactions of genetics with the environment, an organism experiences that determines the ultimate outcome. For example, while genes play a role in determining a person's height, the nutrition and health, that person experiences in childhood also have a large effect.
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