3 Tutorials that teach Traits
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Next Generation: MS.LS3.2 MS.LS3.2


Author: Nathan Lampson
This lesson will explain how traits are passed down by alleles, and that one particular genotype determines one particular phenotype
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Introduction to Psychology

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The traits of an organism are determined by sequences of DNA passed down from generation to generation. 

One or more forms of a gene that produce different traits are called an allele.



One allele may produce a brown hair color, while another might produce blonde hair color.

Parents pass alleles to their offspring during reproduction. 


The type of allele contained in DNA is called a genotype.


Bob possesses the genetic allele in his DNA for a widows peak hairline.


The type of physical characteristic that is a result of a certain allele is called a phenotype.


Bob's widows peak hairline is his phenotype.