The Theory Of The Gene by Thomas Hunt Morgan

1. What organism did Morgan use for his experiments?

A) Worms
B) Mice
C) Fruit flies (Drosophila melanogaster)
D) Peas

2. What did Morgan discover about genes?

A) They are located on chromosomes.
B) They are found in the nucleus.
C) They are inherited randomly.
D) They are made of proteins.

3. What term describes the observable traits of an organism?

A) Genotype
B) Phenotype
C) Allele
D) Karyotype

4. What does the term 'recombination' refer to?

A) The mixing of species.
B) The cloning process.
C) The re-assortment of genetic material during meiosis.
D) The alteration of DNA sequences.

5. What did the term 'crossing over' refer to?

A) The exchange of genetic material between homologous chromosomes.
B) The mutation in genes.
C) The fusion of gametes.
D) The separation of sister chromatids.

6. What is a linked gene?

A) A gene that has multiple alleles.
B) A gene that is non-functional.
C) A gene located on the same chromosome as another gene.
D) A gene involved in epistasis.

7. What type of inheritance pattern did Morgan study?

A) Sex-linked inheritance
B) Codominance
C) Autosomal dominant
D) Incomplete dominance

8. What is the significance of the concept of linkage?

A) Linkage causes mutations.
B) All genes are unlinked.
C) Genes can change position on chromosomes.
D) Genes close together on a chromosome are inherited together.

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