An experiment was carried out to investigate the inheritance of flower colour. In cross 1, a plant with blue flowers (plant G) was pollinated by another plant with blue flowers (plant H). The resulting seeds were collected and labelled 'batch 1'. In cross 2, plant G was pollinated by a plant with white flowers (plant J). The resulting seeds were collected and labelled 'batch 2'. All the plants were of the same species. Fifty seeds from each of batch 1 and batch 2 were grown and the number of plants with white flowers was counted. The results are shown in Table 3.1. Table 3.1 batch number of plants with white flowers 1 (from cross 1) 12 2 (from cross 2) 27

1. (a)Name the dominant phenotype in this experiment The alleles controlling flower colour in this plant are B (dominant) and b (recessive).[1]
2. (b)(i)State the genotypes of plant G plant H plant J[3]
3. (b)(ii)State which of these plants is heterozygous[1]
4. (c)In the box below, draw a genetic diagram for cross 1 (between plants G and H).[5]