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Principles Of Inheritance And Variation

Question

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A black-colour cock when bred with a white coloured hen produced steel blue coloured offspring and when inbred, black, white and steel-blue coloured progeny were obtained:
(a) This result is genetically explained as.
(b) What will be the expected ratio and proportions of black, steel-blue and white progeny?

Solution

(a) Incomplete dominance
(b) The expected ratio will be 1 : 2 : 1.
i.e. 1 black, 2 steel-blue and 1 white.

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