alleryPleiotropy refers to:
ALinked genes
BNo trait
CMany genes for one trait
DOne gene affecting multiple phenotypic traits
Answer & Solution
Correct answer: D. One gene affecting multiple phenotypic traits
**Pleiotropy:** single gene affects multiple unrelated traits.
**Examples:** PKU (phenylketonuria) — gene defect causes intellectual disability, light skin, eczema.
Sickle cell HbS affects RBC shape, anemia, malaria resistance, organ damage.
Keep practising Unit 5C: Non-Mendelian Genetics & Population Transmission
Browse all Unit 5C: Non-Mendelian Genetics & Population Transmission questions for AP Biology, or explore more Biology topics.
Related questions
Which of the following is **not** a stop codon?The semiconservative nature of DNA replication was experimentally proved by:The F₂ **genotypic** ratio in Mendel's monohybrid cross is:In Mendel's monohybrid cross between true-breeding tall (TT) and dwarf (tt) plants, the F₂Mendel conducted his hybridisation experiments on which plant?In the Watson-Crick double helix, adenine pairs with thymine via how many hydrogen bonds?In birds, the sex-determination mechanism is:Down syndrome in humans is caused by