Which of the following best describes stabilizing selection?
Favors extreme phenotypes and increases variation
Favors one extreme phenotype and shifts the mean
Favors intermediate phenotypes and reduces variation
Leads to the formation of new species
Related Questions
Resistant varieties evolved in much lesser time because of
Natural selection
Faster rate of mutation
Anthropogenic (human) activities
Random selection
Neo-geographic speciation can be found in
Populations that experience a sudden genetic mutation
Populations that remain in the same geographic area
Populations that have expanded into new geographic areas
Populations that undergo sympatric speciation
When a species gets separated geographically, it evolves separately. Which of the following condition would determine whether they are now different species?
I. They failed to interbreed
II. They failed to give fertile offspring
III. They have different coloured body
IV. They appear morphologically slightly different
Choose the correct combination from given options
I and II
II and III
III and IV
I and IV
Modern synthetic theory is based on
Mutation
Population
Isolation
All of these
Random genetic drift in a population probably results from
Constant low mutation rate
Large population size
Highly genetically variable individuals
Interbreeding within this population
Which of the following features are connected with the modern theory of evolution?
I. Genetic and chromosomal mutation
II. Genetic recombination and natural selection
III. Reproductive isolation
The correct combination is
I and II
II and III
I and III
I, II and III
Before Darwin, Lamarck had said that evolution of life forms had occurred but driven by
Inheritance characters
Use and disuse of organs
Natural selection
Mutations
Which of the following factor would affect the future population?
Mutation in sperm or egg
Exercise daily
Mutation in somatic cell
2nd and 3rd
Arrange the following events in a sequential order to describe the phenomenon of speciation
I. Over production rapid multiplication
II. Limited food and space
III. Struggle for existence
IV. Speciation
V. Inheritance of useful variation
VI. Natural selection/survival of the fittest
VII. Appearance of variation
The correct sequence is
I, II, III, V, VI, VII, IV
I, IV, II, III, VI, VII, V
I, II, IV, VI, III, VII, V
I, II, III, VII, VI, V, IV
Genetic drift is most likely to significantly impact allele frequencies in:
Large, interconnected populations
Small, isolated populations
Populations with high mutation rates
Populations undergoing strong natural selection
