18 Questions
What concept describes the event when a small group of individuals leaves a population and establishes a new one in a geographically isolated region?
Founder effect
Which term best describes the scenario in which genetic changes occur due to random chance rather than due to selective pressures?
Genetic drift
What phenomenon leads to a few individuals leaving behind more descendants than others due to random chance?
Genetic drift
In the context of genetic changes, what process involves the transfer of genes from one population to another?
Gene flow
Which of the following is a genetic disorder caused by the presence of an extra chromosome 21?
Trisomy 21
What term refers to a sudden change in a gene or chromosome that can lead to genetic diseases or variations?
Mutation
Which process involves the migration of genes from one population to another?
Gene flow
In genetic terms, what is the Trisomy 21 mutation characterized by?
Gain of a chromosome
Which occurrence can potentially lead to a genetic mutation in an organism even before conception?
Mutation
What effect does gene flow have on the genetic similarity between populations of the same species?
Increases similarity
Which mechanism can introduce new genes into a local population's gene pool?
Gene flow
Which phenomenon might lead to the establishment of gene flow in a population following individuals bringing new genes?
Migration event
What is the key process that occurs when populations of organisms are subjected to the environment, resulting in the fittest creatures passing their genes to their offspring?
Natural selection
In the context of the text, what term refers to the situation where green beetles are easier for birds to spot, leading to brown beetles being more common in the next generation?
Natural selection
Which mechanism of evolution refers to the random change in gene frequencies that can occur in a small population?
Genetic drift
If a population of organisms experiences a change in allele frequencies due to the movement of individuals between different populations, what mechanism of evolution is at play?
Gene flow
Which term describes the genetic variation that arises due to errors in DNA replication or exposure to mutagens?
Mutation
If a population is founded by only a small number of individuals leading to reduced genetic diversity, what evolutionary phenomenon does this describe?
Founder effect
Test your knowledge on Trisomy 21 mutation, which is caused by an extra copy of chromosome 21. Explore the concept of gene flow, which involves the movement of genes between populations. This quiz covers mutations, gene flow, and their impacts on genetic diversity.
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