Gregor Mendel studied the shape of seeds in pea plants.
The Table shows his results for the second generation.
Table
| Seed shape | Number of seeds |
|---|---|
| round | 5474 |
| wrinkled | 1850 |
Calculate the ratio of round seeds to wrinkled seeds in the second generation.
Give your answer to the nearest whole number in the form x:1x:1x:1.
At the time, many scientists thought that the characteristics of two parents blended together in their offspring.
Explain how Mendel's results showed that each plant has two 'inherited factors' for seed shape, and that the factor for wrinkled seeds was not lost in the first generation.
Mendel's work was not accepted by other scientists until after his death.
Suggest two reasons why.
186 exam-style questions on OCR GCSE Biology 5.1 Inheritance, covering 5.1.1 The genome, 5.1.2 Environment and phenotype, 5.1.3 Variants and mutations, 5.1.4 How genetic variants influence phenotype, 5.1.5 Asexual and sexual reproduction, 5.1.6 Haploid and diploid, 5.1.7 Meiotic cell division, 5.1.8 Single gene inheritance, 5.1.9 Predicting single gene crosses, 5.1.10 Sex determination, 5.1.11 Multiple gene inheritance, and 5.1.12 Development of our understanding of genetics. Each one has a worked solution and a mark scheme showing where the marks go.