Genes that influence height in humans are:
Correct answer: C. Polygenes
- A. Codominant
- B. Epistatic
- C. Polygenes
- D. Pleiotropic
Explanation
Option A: Both alleles of a gene are expressed equally and independently in the 'Heterozygous' condition. Offspring shows the phenotype of both parents. Option B: One gene suppresses the expression of another gene that is located at a different locus. Option C: 'Polygenes' control continuously varying traits, which are controlled by alleles of two or more separate genes located at different loci. The genes are called polygenes. In humans, skin color, height, and intelligence are examples of polygenic traits. Option D: 'Pleiotropy' refers to multiple effects 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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