Gene Flow and Genetic Change in Populations

The video tutorial explains gene flow as a mechanism of genetic change within a population, occurring through migration, immigration, and emigration. It contrasts gene flow with gene transfer, which involves the transfer of alleles between different species. Examples of gene transfer include bacterial gene uptake, viral DNA insertion, and hybridization in plants. The tutorial clarifies these concepts and their roles in evolution.

What is the primary cause of genetic change within a population?

• Gene flow

• Mutation

• Natural selection

• Genetic drift

How does immigration affect a population's gene pool?

• It introduces new alleles

• It removes alleles

• It decreases genetic diversity

• It stabilizes allele frequencies

What happens during emigration in terms of genetic impact?

• Genetic diversity increases

• New alleles are introduced

• Allele frequencies remain unchanged

• Alleles are removed from the population

What is gene transfer?

• Transfer of alleles within the same species

• Transfer of alleles between different species

• Random changes in allele frequencies

• A type of natural selection

Which organisms are known for gene transfer through taking genes from others?

• Animals

• Bacteria

• Viruses

• Plants

How can viruses contribute to gene transfer?

• By stabilizing host DNA

• By preventing gene flow

• By inserting their DNA into host cells

• By removing host genes

What is hybridization in the context of gene transfer?

• Random mutation of genes

• Stabilization of gene frequencies

• Transfer of genes within a species

• Crossing of two species leading to gene addition

Which of the following is an example of gene transfer?

• Immigration of new individuals

• Bacteria acquiring genes from dead bacteria

• Emigration of individuals

• Natural selection

What distinguishes gene flow from gene transfer?

• Gene flow involves migration within a species

• Gene transfer occurs within the same species

• Gene transfer involves random genetic changes

• Gene flow occurs between species

What is the main difference between gene flow and gene transfer?

• Gene flow is between species, gene transfer is within species

• Gene flow is within species, gene transfer is between species

• Both occur within species

• Both occur between species