The conclusions of de Vries from his experiments with Oenothera lamarckiana include:
A. Mutations are unidirectional
B. New elementary species appear suddenly that attain immediately full constancy
C. Mutants are produced only once in large numbers, which are subjected to natural selection
D. Mutations are almost similar to the fluctuating variations
Answer: Option B
This Question Belongs to Biology GK Chapter Wise >> Gentics And Evoloution
A piece of DNA molecule that can serve as a carrier for the gene to be cloned is called as a
A. Virus
B. Vector
C. DNA junk
D. Gene factor
A haploid organism contains only one set of chromosomes, and is said to be
A. Homozygous
B. Heterozygous
C. Hemizygous
D. Holozygous
Which of the following is the correct pair?
A. Darwin - Use and disuse of organs
B. de Vries - Mutation theory
C. Lamarck - Origin of life
D. Haldane - Law of heredity
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