20 Questions
Which type of mutations are typically harmful?
Mutations that delete many loci
What happens when duplicated genes are not harmful?
They accumulate mutations and take on new functions
What is the role of gene duplications in evolution?
They play a major role in evolution
What is the average mutation rate in animals and plants?
One in every 100,000 genes per generation
Why do prokaryotes have faster accumulation of genetic variation?
They have shorter generation times
Why do viruses have faster mutation rates?
Their RNA genome cannot be repaired by host cells
What is the main source of genetic variation in organisms that reproduce sexually?
Recombination of alleles
Which mechanism of sexual reproduction shuffles existing alleles into new combinations?
Crossing over
What is the role of independent assortment in sexual reproduction?
It ensures random fertilization
What is the role of random fertilization in sexual reproduction?
It shuffles existing alleles into new combinations
Which process can result in the formation of new alleles?
Mutation
What is the main source of genetic variation in sexual reproduction?
Arrangement of existing genes
Which type of mutation often results in neutral variation?
Mutation in noncoding regions
What can rare mutant alleles potentially improve in organisms?
Reproductive success
Which process can lead to the creation of new genes?
Gene duplication
What is the result of genetic variation through mutation?
New alleles and genes
Which process can create genetic variation in asexual organisms?
Mutation
What is the role of gene duplication in the formation of new alleles?
To create additional copies of a gene
What is the result of neutral variation in noncoding regions of DNA?
No selective advantage or disadvantage
Which process can create new alleles in organisms?
Mutation
Test your knowledge on the sources of genetic variation with this quiz. Explore how mutation, gene duplication, and other processes contribute to the creation of new alleles and genes. Understand how sexual reproduction plays a role in rearranging existing genes to generate genetic diversity.
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