Biology / Unit 5 Bio 1027 short lesson, about 20 seconds
Genotype and Phenotype, Locked Terms
Captions available
The idea
A genotype is an organism's allele combination at a locus; a phenotype is the observable trait it produces, and this course fixes both terms.
In practice
Two pea plants with different genotypes, YY and Yy, can share the identical yellow-seed phenotype.
Where people slip
Inferring a genotype directly from a dominant phenotype is the mistake — a yellow-seeded plant may be YY or Yy, hence testcross 1037.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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