HELIXPrep › Genetics, Cellular and Molecular Biology › Genetics & Evolutionary Biology
Module 3.1 · Topic 3
Module 3.1 · Topic 3
What Mendel's rules assumed without saying so
Last lesson's whole Punnett-square machinery quietly assumed something: that the two genes involved assort completely independently, as if drawn from separate hats. That assumption holds when genes sit on different chromosomes — but most genes don't have that luxury. A single chromosome carries thousands of them.
Two genes sit close together on the very same chromosome. Do they still assort independently, the way the Punnett square from last lesson assumed?
Two genes located very close together on the same chromosome will typically show:
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