NEETZoologyEvolution
How can advantageous mutations lead to speciation according to the paragraph?
Options
- ABy causing immediate genetic drift
- BBy resulting in the appearance of new phenotypes over few generations
- CBy directly altering allele frequencies in a single generation
- DBy decreasing genetic diversity in the population
Correct answer
B. By resulting in the appearance of new phenotypes over few generations
Step-by-step solution
Microbial experiments show that pre-existing advantageous mutations when selected will result in observation of new phenotypes. Over few generations, this would result in Speciation. Natural selection is a process in which heritable variations enabling better survival are enabled to reproduce and leave greater number of progeny. A critical analysis makes us believe that variation due to mutation or variation due to recombination during gametogenesis, or due to gene flow or genetic drift results in changed frequency