When phenotype of a heterozygote is in between the phenotypes of both the homozygous parents, it is called:
Correct answer: A. Incomplete dominance
- A. Incomplete dominance
- B. Epistasis
- C. Pleiotropy
- D. Codominance
Explanation
This type of relationship between alleles, with a heterozygote phenotype intermediate between the two homozygous phenotypes, is called incomplete dominance. In the question, "in between" is closest in meaning to "intermediate", thus incomplete dominance is the correct choice. Thus, the correct answer is 'Diphtheria, Leprosy, Plague.'
This question appeared on the NUMS 2016 paper, which you can sit online with every answer explained.
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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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