Biology 0610 · IGCSE · Monohybrid inheritance

Monohybrid inheritance — practice question

Polydactyly is an inherited condition that can occur in cats. It causes the affected offspring to have extra toes. The allele for polydactyly is dominant and is shown by the letter T. The allele for not having polydactyly is recessive and is shown by the letter t. A cat with genotype Tt is bred with a cat with genotype tt. What is the chance of the offspring having polydactyly?

  • A25%
  • B50%
  • C75%
  • D100%

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