Appearance of a recessive trait proves what?
Answer and explanation
Correct answer: The dominant form is absent and both alleles are recessive
The governing concept is dominance and recessiveness. A recessive phenotype appears only when an individual has two recessive alleles, written as aa, because no dominant allele is present to mask it. Thus observing the recessive trait provides evidence of a homozygous recessive genotype in the usual Mendelian model. A high amount of a dominant form, absence of hereditary information, or food alone cannot explain this inheritance pattern.
Frequently asked questions
What is the correct answer to this question?
The dominant form is absent and both alleles are recessive
Why is this the correct answer?
The governing concept is dominance and recessiveness. A recessive phenotype appears only when an individual has two recessive alleles, written as aa, because no dominant allele is present to mask it. Thus observing the recessive trait provides evidence of a homozygous recessive genotype in the usual Mendelian model. A high amount of a dominant form, absence of hereditary information, or food alone cannot explain this inheritance pattern.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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