Question Constellation Sign up for free

AQA · GCSE · Combined Science · Higher

Punnett square inheritance probability

Q01.4 5 marks

A person with the genotype Dd and a person with the genotype dd plan to have a child.

Determine the probability that the child will have polydactyly.

You should:

complete the Punnett square diagram

identify any offspring genotype that would have polydactyly.

Probability that the child will have polydactyly =

Practice unavailable

This question can be viewed, but its original response format is not available for practice yet.

Write your answer first. You can study the marking guidance whenever you need it.

Study the marking See what earns credit and compare it with a full-mark answer.

What a strong answer needs

  1. 1 Parent genotypes
  2. 2 Gametes
  3. 3 Offspring grid
  4. 4 Phenotype
  5. 5 Probability