Which statement about dominant and recessive alleles is not correct?
Correct answer: D. The phenotype of a homozygote is always dominant.
- A. A dominant characteristic is seen in the phenotype of a heterozygote.
- B. A homozygous genotype may be either dominant or recessive.
- C. Recessive phenotypes always have two recessive alleles.
- D. The phenotype of a homozygote is always dominant.
Explanation
Phenotype of a homozygote can be dominant or recessive both AA or aa. Hence statement D is incorrect and our answer.
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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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