Why genes on the same chromosome don't always sort independently
In short: Genetic inheritance isn't always a game of pure chance. This video explores how linked genes stay together, using fruit fly simulations and historical data to show why certain traits travel in pairs.
While Mendel’s laws suggest independent assortment, genes located close to one another on the same chromosome are 'linked.' Paul Andersen demonstrates this using a dihybrid cross simulator for fruit flies. Because these genes are physically connected, they do not segregate freely during meiosis.
The video utilizes chromosome-based Punnett squares to illustrate why recombination frequencies often fall below 50%. It also highlights the foundational work of Thomas Morgan and Alfred Sturtevant, featuring their actual discovered crosses to ground these biological principles in history.
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- Summary by Intellect · source: Linked Genes
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