Pick up the genotype which produces phenotype A.
Correct answer: C. IAIA or IAi
- A. IAIB
- B. IBi
- C. IAIA or IAi
- D. ii
Explanation
The genotype IAIA is homozygous for allele IA, which produces phenotype A. Similarly, the genotype IAi is heterozygous, where the IA allele is dominant over the recessive i allele, also resulting in phenotype A. Therefore, both IAIA and IAi genotypes produce phenotype A, making Option C correct. The genotype ii results in phenotype O because both alleles are recessive, which is why Option D is incorrect.
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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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