A gene showing co-dominance has:
Correct answer: B. Both alleles independently expressed in the heterozygote
- A. Alleles that are recessive to each other
- B. Both alleles independently expressed in the heterozygote
- C. One allele dominant to the other
- D. Alleles tightly linked on the same chromosome
Explanation
Codominance means both alleles are fully expressed in heterozygotes (e.g, IA + IB → AB blood , producing distinct contributions from each allele.
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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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