A student says that Mendel showed inherited characteristics always blend because he crossed tall and short plants.
Which observation provides evidence against this claim?
The plants in each cross all needed water for their growth.
Short plants reappeared after two tall offspring were crossed.
The plants in each cross all produced flowers with pollen.
The original tall and short plants belonged to one species.
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.