alleryStart learning →Which of these is included in an organism's genotype but not in its phenotype?
AA dominant allele that is fully expressed
BA recessive allele that is not expressed
CA visible trait such as violet flower colour
DA seed texture scored as round or wrinkled
Answer & Solution
Correct answer: B. A recessive allele that is not expressed
1. Genotype is the underlying genetic makeup, covering both visible and non-expressed alleles.
2. Phenotype covers only what can be observed.
3. A recessive allele masked by a dominant partner is in the genotype yet invisible in the phenotype.
4. A dominant allele that is fully expressed appears in both, so it does not separate the two ideas.
5. Flower colour and seed texture are scored by eye, so they are phenotype.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 12 "Mendel's Experiments and Heredity", section 12.2 Characteristics and Traits_
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