The Theory Of The Gene by Thomas Hunt Morgan

1. What organism did Morgan use for his experiments?

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

2. What did Morgan discover about genes?

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

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

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

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

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

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

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

6. What is a linked gene?

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

7. What type of inheritance pattern did Morgan study?

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

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

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

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