(a)[2]
Explain the meaning of autosomal linkage.
(b)[4]
In sweet peas, the allele for purple flowers is dominant over the allele for red flowers, and the allele for long pollen grains is dominant over the allele for round pollen grains. A sweet pea plant heterozygous for both purple flowers and long pollen grains is crossed with a sweet pea plant with red flowers and round pollen grains. The outcomes of this cross are shown in Table 8.1. Describe and explain the pattern shown in Table 8.1.
(c)[3]
The different alleles that affect flower colour in the sweet pea plant are produced by gene mutations. State how a gene mutation may arise.