In pea plants the allele for round seeds, R, is dominant to the allele for wrinkled seeds, r.
The table gives information about three pea plants.
Table: The genotypes and phenotypes of three pea plants, where R is the allele for round seeds and r is the allele for wrinkled seeds
| Pea plant | Genotype | Phenotype |
|---|---|---|
| X | RR | |
| Y | wrinkled seeds | |
| Z | Rr |
Complete the table.
Give the meaning of the term 'heterozygous'.
Plant Z is crossed with plant Y. Give the expected ratio of round seeded offspring to wrinkled seeded offspring.
76 exam-style questions on AQA GCSE Biology 6.1 Reproduction, covering 6.1.1 Sexual and asexual reproduction, 6.1.2 Meiosis, 6.1.3 Advantages and disadvantages of sexual and asexual reproduction, 6.1.4 DNA and the genome, 6.1.5 DNA structure, 6.1.6 Genetic inheritance, 6.1.7 Inherited disorders, and 6.1.8 Sex determination. Each one has a worked solution and a mark scheme showing where the marks go.