The table describes four events in the development of our understanding of genetics.
Table: Four events in the development of our understanding of genetics, and the time at which each event happened
| Time | Event |
|---|---|
| Mid-19th century | A scientist showed that characteristics are inherited as separate 'units' |
| Late 19th century | The behaviour of chromosomes during cell division was observed |
| Early 20th century | Chromosomes and the 'units' were seen to behave in similar ways |
| Mid-20th century | The structure of DNA was determined |
Give the name of the scientist who carried out the breeding experiments in the mid-19th century.
Name the type of plant that this scientist used in his breeding experiments.
Use the table to explain why the idea that genes are found on chromosomes could not have been suggested in the mid-19th century.
The work in the table was carried out by many different scientists over about 100 years. Suggest one advantage of many scientists working on the same idea.
40 exam-style questions on AQA GCSE Biology 6.3 The development of understanding of genetics and evolution, covering 6.3.1 Theory of evolution, 6.3.2 Speciation, 6.3.3 The understanding of genetics, 6.3.4 Evidence for evolution, 6.3.5 Fossils, 6.3.6 Extinction, and 6.3.7 Resistant bacteria. Each one has a worked solution and a mark scheme showing where the marks go.