GENE FLOW in evolution the biggest factor in evolution

Gene flow in evolution it is the detail of how gene flow cause evolution in environment

1. GENE FLOW
PRESENTED BY: MEHAK FATIMA
ROLL NO: 21011514-007

2. Gene flow
•It is also called migration or allele flow.
•Gene flow is the transfer of genetic material from
one population to another. It is change in gene
frequency from migration of individual.
•It is a potent agent of change.
•It cause disturbance in gene flow.

4. Factors
Emigration
Immigration
Individuals leaving
the population
Individuals arriving
in he population

5. Examples
•These finches diversified
from a common ancestor
and adapted to various
ecological niches on
different islands, leading to
the evolution of different
species with distinct beak
shapes and feeding habits.

6. Continue………
Gene flow can increase the fitness of a population
•Consider, for example, the spread of alleles for resistance to
insecticides
•Insecticides have been used to target mosquitoes that carry
West Nile virus and malaria
•Alleles have evolved in some populations that confer
insecticide resistance to these mosquitoes
•The flow of insecticide resistance alleles into a population can
cause an increase in fitness