Albinism is an inherited condition. People with albinism have very little colour in their skin, hair and eyes.
Albinism is caused by a recessive allele, aaa. The dominant allele is AAA.
A man and a woman do not have albinism. Their first child has albinism.
Explain the probability that their next child will have albinism and the probability that their next child will be a carrier of albinism.
You may use a genetic diagram in your answer.
43 exam-style questions on Edexcel GCSE Biology 3.3 Inheritance, covering 3.3.1 Gregor Mendel and the basis of genetics, 3.3.2 Alleles and inherited characteristics, 3.3.3 Monohybrid inheritance, 3.3.4 Determination of sex at fertilisation, 3.3.5 Outcomes from monohybrid crosses, 3.3.6 Inheritance of ABO blood groups, 3.3.7 Inheritance of sex-linked disorders, and 3.3.8 Multiple genes and phenotypic features. Each one has a worked solution and a mark scheme showing where the marks go.