Human Growth and Development / Unit 2 HGD 0157 short lesson, about 20 seconds
Genotype, Allele and Phenotype
Captions available
The idea
A genotype is the set of genes a person inherits, which cannot be directly observed; a phenotype is the observable characteristics.
In practice
Two brown-eyed people, alike in phenotype, one carrying a hidden allele for blue eyes.
Where people slip
An allele is a variant form of a gene. Each person carries two alleles for most genes, one from each parent.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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