Punnett and Bateson knew that in sexual reproduction both parents contribute a gamete to the offspring, but some of their traits disappeared in one generation only to reappear in a later generation.

Genetic inheritance - AQA How to construct Punnett squares - Higher. ... Work out the new possible genetic combinations inside the Punnett square. Use this to answer the question.

Complete this Punnett square to show the allele combinations of the possible offspring produced. b. Calculate the probability that an offspring will have the combination DD.