ICSE Class 10 - Theories of Evolution Videos

Darwin's theory could not explain the cause of variations in organisms. 

Gene flow results in the reduction of genetic variation in two sub-populations. This does not favour variations and formation of new species through speciation. 

Genetic drift is the random changes in the frequency of traits in a population over successive generations. 

Perfectly paired 22 sets of chromosomes in human beings are called autosomes