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The Theory Of The Gene by Thomas Hunt Morgan
Contributed by: Day
  • 1. What organism did Morgan use for his experiments?
A) Mice
B) Peas
C) Worms
D) Fruit flies (Drosophila melanogaster)
  • 2. What did Morgan discover about genes?
A) They are found in the nucleus.
B) They are inherited randomly.
C) They are made of proteins.
D) They are located on chromosomes.
  • 3. What term describes the observable traits of an organism?
A) Karyotype
B) Phenotype
C) Genotype
D) Allele
  • 4. What does the term 'recombination' refer to?
A) The alteration of DNA sequences.
B) The cloning process.
C) The mixing of species.
D) The re-assortment of genetic material during meiosis.
  • 5. What did the term 'crossing over' refer to?
A) The mutation in genes.
B) The fusion of gametes.
C) The exchange of genetic material between homologous chromosomes.
D) The separation of sister chromatids.
  • 6. What is a linked gene?
A) A gene that is non-functional.
B) A gene that has multiple alleles.
C) A gene involved in epistasis.
D) A gene located on the same chromosome as another gene.
  • 7. What type of inheritance pattern did Morgan study?
A) Sex-linked inheritance
B) Autosomal dominant
C) Codominance
D) Incomplete dominance
  • 8. What is the significance of the concept of linkage?
A) All genes are unlinked.
B) Genes can change position on chromosomes.
C) Genes close together on a chromosome are inherited together.
D) Linkage causes mutations.
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