QUESTION 2: 10 Minutes (Taken from DBE Nov 2015, Paper 2) A lack of immunity to infections (agammaglobulinemia) is a sex-linked recessive genetic disorder in humans. The dominant allele is represented by XA Xa. and the recessive allele is represented by An individual with the disorder is described as affected and an individual without it is described as unaffected. The pedigree diagram below illustrates inheritance of this disorder. 2.1 Name the genotypes of individuals: (2) (a) 1 (2) (b) 2
QUESTION 2: 10 Minutes (Taken from DBE Nov 2015, Paper 2) A lack of immunity to infections (agammaglobulinemia) is a sex-linked recessive genetic disorder in humans. The dominant allele is represented by XA and the recessive allele is represented by Xa. An individual with the disorder is described as affected and an individual without it is described as unaffected. The pedigree diagram below illustrates inheritance of this disorder. 2.1 Name the genotypes of individuals: (a) 1 (b) 2 (2) (2)
genetics_session_no_15_learner_notes.docx