Multiple alleles control inheritance of
Correct answer: D. Blood Groups
- A. Phenylketonuria
- B. Colour Blindness
- C. Sickle Cell Anaemia
- D. Blood Groups
Explanation
The correct option is d) Blood Groups. The ABO blood group system is controlled by multiple alleles: A, B, and O. The presence of A or B antigens on red blood cells depends on these alleles, with A and B being codominant, and O being recessive. This results in various blood types. In contrast, Phenylketonuria, colour blindness, and sickle cell anaemia are controlled by single mutated alleles and do not involve multiple alleles.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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