Variations In Heredity incomplete dominance codominance sex linkage.

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Presentation transcript:

Variations In Heredity incomplete dominance codominance sex linkage

Incomplete Dominance the traits in Mendel’s pea plants exhibited complete dominance some alleles interact to produce a new phenotype; this is called incomplete dominance

Snapdragons

Codominance in codominance both alleles are expressed at the same time

Thomas Morgan Hunt American geneticist ( ) studied the fruit fly discovered sex linkage

Sex linkage terms… autosomal inheritance sex-linked X-linked Y-linked

Some sex-linked traits… red-green colourblindness hemophilia A male-pattern baldness

Pedigree Charts

Try the Practice questions on page 199…

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