A pleiotropic gene:
Correct answer: B. Controls multiple traits in an individual
- A. Controls a trait only in combination with another gene
- B. Controls multiple traits in an individual
- C. Is expressed only in primitive plants
- D. Is a gene evolved during the Pliocene
Explanation
Pleiotropy occurs when a single gene affects several different phenotypic traits (for example, one mutation causing multiple symptoms).
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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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