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Polygenic Inheritance Activity

Polygenic Inheritance Activity. Image captured from www.mayoclinic.com/health/medical/IM01495. Background Information. Simple dominance is inheritance based on two alleles, or forms of a trait, determined by one gene.

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Polygenic Inheritance Activity

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  1. Polygenic Inheritance Activity Image captured from www.mayoclinic.com/health/medical/IM01495

  2. Background Information • Simple dominance is inheritance based on two alleles, or forms of a trait, determined by one gene. • Polygenic inheritance includes traits that are controlled by two or more genes. Skin, eye, and hair color are all traits that are controlled by at least three genes. • Variations in the allele combinations from the genes cause variations in pigmentation.

  3. Flipping Coins Determine the varieties of skin color for six individuals. To do this activity, you need three pennies. Each penny represents one gene. Heads is the dominant allele and tails is recessive. Flip each penny twice for each of the three genes controlling skin pigmentation. Record the results. Key • AABBCC – Dark brown • AaBBCC • AABbCC Medium browns • AABBCc • aaBBCC • AAbbCC Light browns • AABBcc • AaBbCC • AABbCc Dark tans • AaBBCc • Aabbcc • aaBbcc Fair • aabbCc • aabbcc – Albino • AaBbCc • aaBbCC • AabbCC Medium tans • AABbcc • aaBBCc • AAbbcc • aaBBcc • aabbCC Light tans • aaBbCc • AaBbcc • AabbCc Image captured from www.devbio.biology.gatech.edu.

  4. Example of Data Chart

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