A plant with genotype Pp Pp\,Pp is crossed with a plant with genotype pppppp. The allele P P\,P is dominant. Of 200 offspring, 108 show the dominant phenotype.
How does this compare with the expected number showing the dominant phenotype?
888 fewer than expected
585858 more than expected
888 more than expected
585858 fewer than expected
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.