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Genetic Traits
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Genetic Traits

Genetic Traits

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Earlobe

Earlobe

Attachment

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Some scientists have reported that this trait is due to a single gene for which unattached earlobes is dominant and an attached earlobe is recessive. Other scientists have reported that this trait is probably due to several genes.

Some scientists have reported that this trait is due to a single gene for which unattached earlobes is dominant and an attached earlobe is recessive. Other scientists have reported that this trait is probably due to several genes.

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Thumb Extension

Thumb Extension

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This trait is reportedly due to a single gene; strait thumb is dominant and hitchhiker's thumb is recessive.

This trait is reportedly due to a single gene; strait thumb is dominant and hitchhiker's thumb is recessive.

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Tongue Rolling

Tongue Rolling

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Tongue rolling ability may be due to a single gene with the ability to roll the tongue a dominant trait and the lack of tongue rolling ability a recessive trait.However, many twins do not share the trait, so it may not be inherited.

Tongue rolling ability may be due to a single gene with the ability to roll the tongue a dominant trait and the lack of tongue rolling ability a recessive trait.However, many twins do not share the trait, so it may not be inherited.

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Dimples

Dimples

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Dimples are reportedly due to a single gene with dimples dominant (people may exibit a dimple on only one side of the face) and a lack of dimples is recessive.

Dimples are reportedly due to a single gene with dimples dominant (people may exibit a dimple on only one side of the face) and a lack of dimples is recessive.

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Handedness

Handedness

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Some scientists have reported that handedness is due to a single gene with right handedness dominant and left handedness recessive. However, other scientists have reported that the interaction of two genes is responsible for this trait.

Some scientists have reported that handedness is due to a single gene with right handedness dominant and left handedness recessive. However, other scientists have reported that the interaction of two genes is responsible for this trait.

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Freckles

Freckles

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This trait is reportedly due to a single gene’ the presence of freckles is dominant, the absence of freckles is recessive.

This trait is reportedly due to a single gene’ the presence of freckles is dominant, the absence of freckles is recessive.

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Hair curl

Hair curl

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Early geneticists reported that curly hair was dominant and strait hair was recessive. More recent scientists believe that more than one gene may be involved.

Early geneticists reported that curly hair was dominant and strait hair was recessive. More recent scientists believe that more than one gene may be involved.

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Allergies

Allergies

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