Mendelian inheritance chart. The parents (P1, top row) are a white bantam and a black bantam. The first hybrid generation (F1, second row) consists of


Mendelian inheritance chart. The parents (P1, top row) are a white bantam and a black bantam. The first hybrid generation (F1, second row) consists of black bantams carrying genes from both parents. Mating these birds produces a second hybrid generation (F2, bottom) where a quarter of the bantams are white. This indicates that the black colour is dominant, and the white colour is recessive. Colour being determined by a single gene is known as a Mendelian trait or Mendelian inheritance. Mendelian traits occur in strict mathematical ratios. This chart was from the Eugenics Record Office (founded 1910), Cold Spring Harbor, New York, USA.


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Photo credit: © AMERICAN PHILOSOPHICAL SOCIETY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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