Figure 3.1 shows rabbits A and B which were used in a breeding experiment. Rabbit A (black patched) was fed a balanced diet while rabbit B (wholly white) was fed a diet deficient in iron. After several weeks rabbit A had normal active behaviour and rabbit B appeared tired and showed little movement.

1. aExplain why rabbit B showed the symptoms observed. [4]
2. bExplain why the symptoms observed in the rabbit cannot be passed onto its offspring. [1]
3. cThe coat colour of rabbits is determined by two alleles, R and r. Allele R gives white coat and is dominant to allele r, which gives black patch. With the aid of a genetic diagram, describe how you could find out the genotype of a wholly white rabbit. [5]

You'll mark your own answer against the marking guide when you hand it in.