Quiz  /  NEET MCQ on Polygenic Inheritance

  • 1. 
    In corolla length of Nicotiana longiflora, polygenic inheritance was studied by

  • Joseph Kolreuter
  • E.M. East
  • Francis Galton
  • Nilsson-Ehle

  • 2. 
    Marriages between close relatives should be avoided as it causes more

  • Abnormalities in child birth
  • Mutations
  • Recessive alleles to come together
  • Multiple births

  • 3. 
    When two or more nonallelic gene pairs affect the same character in the same way, it is called

  • pleiotropy
  • polygenic inheritance
  • additive expressivity
  • total penetrance

  • 4. 
    Polygenes exhibit

  • Different phenotypes
  • Different genotypes
  • Similar genotypes and phenotypes
  • Both and

  • 5. 
    Raju and Rani are planning a family, but sas each has a brother having the sickle-cell disorder, they are worried that their kids might develop the disorder too Neither Raju, Rani nor their respective parents have the disorder They decide to consult a genetic counsellor who conveys them this

  • its is possible that none of their kids will have the disorder, but blood tests on both of
  • all of their children will have sickle-cell disorder
  • one of four of their children can be expected to have sickle cell
  • there is no chance of any of their kids having sickle cell

  • 6. 
    Traits which exhibit continuous phenotypic variation are typically determined by this inheritance form

  • incomplete dominance
  • polygene inheritance
  • multiple-allele inheritance
  • sex-linked inheritance

  • 7. 
    One of the X chromosomes in females is inactivated by

  • environmental factors
  • enzymes coded for by mitochondrial DNA
  • number of dominant genes found on each X chromosome
  • epigenetic markers

  • 8. 
    Which of these illustrates pleiotropy?

  • Matings between earless sheep and long eared sheep always result in short eared
  • Human cystic fibrosis causes many symptoms from respiratory distress to digestive
  • Wheat kerneis can range from white to red in color, a trait governed by multiple
  • The genes for scarlet eyes and hairy body in fruit flies are located on the same

  • 9. 
    Morphan’s syndrome is as a result of

  • Polygene
  • Pseudogene
  • Modifier gene
  • Pleiotropic gene
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