BIOLOGY 2C03 Lecture Notes - Lecture 17: Human Height, Genetic Variation, Red
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Discontinuous - ie sickle cell - you have the disease or you don"t. However, in reality, there is variation in the disease. Ie partial pressure is lower - they wont be healthy at higher elevation than they are at sea level. Plants - qualitative - height is dwarf or tall. Between 8 and 12cm tall but they are all in the short category, or 12-15cm is all in the tall category. Two genes may be interacting and codominance may be occurring. Need an assay or ruler for measuring with precision the height of the plants. Representing each plant as an individual category or point you could say. There are thresholds where the plants do not go. Ie plants are on average this tall, but in reality you"d have to go out and . Variation in colour of fruit flies but you need to give them the nutrients. Every possible height is represented btw two thresholds with a mean.