Using these letters, indicate the genotype of a woman who is not able to smell the flower.
Using these letters, indicate which alleles could be present in the gametes of a woman who is able to smell the flower.
Fig. 4.1 displays some alleles on a section of the sex chromosomes of a woman and a man. In the space below, draw these alleles as they could be shown in a sperm cell carrying the Y chromosome.
Fig. 4.2 illustrates how the alleles on one of the chromosomes could appear in a cell taken from another part of the man’s body. Allele B indicates a mutation. Suggest two possible causes of the mutation.
Mutated alleles such as the one shown in Fig. 4.2 are usually recessive. Use your knowledge of genetics to explain why society discourages marriage between people who are closely related.