This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Here are the solutions to your questions: 3.1.1 Which blood group shows the greatest percentage difference between the two countries? Step 1: Calculate the absolute percentage difference for each blood group. • Blood group O: |40\% - 20\%| = 20\% • Blood group A: |10\% - 35\%| = 25\% • Blood group B: |45\% - 40\%| = 5\% • Blood group AB: |5\% - 5\%| = 0\% Step 2: Identify the blood group with the greatest difference. The greatest difference is 25\%, which corresponds to blood group A. Blood group A 3.1.2 The population size of country Q is 5 million people. Calculate the number of people who have blood group O. Show ALL your working. Step 1: Identify the percentage of people with blood group O in Country Q from the table. Percentage of population with blood group O in Country Q = 40\%. Step 2: Calculate the number of people with blood group O. Number of people = Percentage × Total population Number of people = 0.40 × 5,000,000 Number of people = 2,000,000 3.1.3 Explain how the inheritance of blood group AB is an example of co-dominance. Co-dominance occurs when both alleles in a heterozygous individual are fully and equally expressed in the phenotype. In blood group AB, an individual inherits both the I^A allele and the I^B allele. Both alleles are expressed, resulting in the presence of both A and B antigens on the red blood cells, rather than a blend or one masking the other. 3.1.4 Explain why blood groups are considered an example of discontinuous variation. Blood groups are an example of discontinuous variation because they fall into distinct, separate categories (A, B, AB, O) with no intermediate forms. Individuals clearly belong to one specific blood group, and there is no continuous range of phenotypes between these categories. 3.1.5 In the inheritance of blood groups, give the: a) Recessive allele i (or I^O) b) Phenotype of an individual who is homozygous recessive Blood group O 3 done, 2 left today. You're making progress.