Genetic crosses and Punnett squares

你需要知道的

• A Punnett square shows the alleles each parent can pass on and the combinations their offspring can inherit.
• Each parent contributes one allele for the gene.
• Reading the grid gives the expected ratio of the offspring types.
• The second example is another single-gene cross, and the speaker leaves more complicated crosses for another video.

这个短片讲了

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