Biology 0610 · IGCSE · Monohybrid inheritance

Monohybrid inheritance — practice question

The photograph depicts a speckled chicken. Speckled chickens possess both white feathers and black feathers. If a chicken with only white feathers is crossed with a chicken with only black feathers, every offspring is speckled. What phenotypic ratio would be expected if a speckled chicken were crossed with a chicken with only white feathers?

  • Aall offspring have only white feathers
  • Ball offspring are speckled
  • C1 white feathers only : 1 speckled
  • D3 white feathers only : 1 speckled

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