Only one form of a trait appears in the first generation out of two forms. This points to which idea?
Answer and explanation
Correct answer: Dominance
In a Mendelian cross, contrasting forms of a trait are represented by different alleles. In a heterozygous first-generation offspring, one allele may mask the expression of the other. The expressed form is called dominant, while the hidden form is recessive. Therefore A, dominance, is correct. Evaporation, excretion and physical balance do not describe allele expression or Mendelian inheritance.
Frequently asked questions
What is the correct answer to this question?
Dominance
Why is this the correct answer?
In a Mendelian cross, contrasting forms of a trait are represented by different alleles. In a heterozygous first-generation offspring, one allele may mask the expression of the other. The expressed form is called dominant, while the hidden form is recessive. Therefore A, dominance, is correct. Evaporation, excretion and physical balance do not describe allele expression or Mendelian inheritance.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Mendel’s laws.
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