Human skin color is also a quantitative trait which is controlled by:
Correct answer: D. Three to six gene pairs
- A. Two to three gene pairs
- B. Three to four gene pairs
- C. Four to five gene pairs
- D. Three to six gene pairs
Explanation
Human skin color is a quantitative trait influenced by three to six gene pairs. This trait exhibits polygenic inheritance, where multiple genes contribute to the phenotype, resulting in a continuous range of skin colors. The correct option is 'Three to six gene pairs' because this range accurately reflects the genetic complexity involved. Options suggesting fewer gene pairs, such as 'Two to three,' 'Three to four,' or 'Four to five,' do not encompass the full genetic range and are therefore incorrect.
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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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