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Polydactyly

Polydactyly. By Anna Lunin. How You Inherit These Genes From Your Parents…. The characteristics that we have depends on the genes that we inherit from our parents. People have two copies of each gene, one copy inherited from the mother and the other copy inherited from the father.

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Polydactyly

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  1. Polydactyly By Anna Lunin

  2. How You Inherit These Genes From Your Parents… • The characteristics that we have depends on the genes that we inherit from our parents. • People have two copies of each gene, one copy inherited from the mother and the other copy inherited from the father. • The two copies of the gene may be exactly the same or be slightly different versions, called alleles. • These genes are present in all people, but slightly different versions, or alleles, account for the variations seen in eye and hair colour.

  3. Dominant vs. Recessive Alleles • In heterozygous individuals, the allele that is "expressed" (seen in individual’s appearance) is the "dominant" allele • The traits that are expressed make up your "phenotype" • The allele that is not expressed is the "recessive" allele. • These are shown in using these diagrams and the capital letter is the dominant allele and the recessive allele is the small letter.

  4. How Polydactyly is inherited • Mutation in a variety of genes can cause polydactyly. • Typically the mutated gene is involved in developmental patterning and a condition of inherited anomalies results, of which polydactyly is one feature. • Or it can occur by itself and this is when it is not a trait with multiple factors. • The condition has an incidence of 1 in every 500 live births.

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