A continuously varying trait is encoded by:
Correct answer: A. Alleles of two or more different gene pairs
- A. Alleles of two or more different gene pairs
- B. Alleles of a single gene pair
- C. Alleles of two or more genomes
- D. Multiple alleles of a single gene
Explanation
A continuously varying trait, also known as a quantitative trait, is typically influenced by alleles of two or more different gene pairs located at different loci. These genes contribute to the trait in an additive fashion, meaning the effect of each gene adds to the overall phenotype. This is why such traits often show a range of phenotypes, rather than discrete categories. The other options are incorrect because they suggest either only one gene or an incorrect understanding of genetic influence, such as involving entire genomes or multiple alleles of a single gene.
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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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