Unit 6 Review

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What is genetic variation?

Back

Genetic variation refers to the differences in DNA sequences among individuals within a population, which can lead to different traits.

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What are the main sources of genetic variation?

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The main sources of genetic variation include mutation, gene flow, and sexual reproduction.

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What is genetic drift?

Back

Genetic drift is a mechanism of evolution that refers to random changes in allele frequencies in a population, which can lead to a loss of genetic variation.

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What is natural selection?

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Natural selection is the process by which organisms with favorable traits are more likely to survive and reproduce, leading to the adaptation of the species.

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What are the principles of natural selection?

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The principles of natural selection include variation, inheritance, differential survival and reproduction.

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What is a phylogenetic tree?

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A phylogenetic tree is a diagram that represents the evolutionary relationships among various biological species based on similarities and differences in their physical or genetic characteristics.

Front

What does the length of branches in a phylogenetic tree represent?

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The length of branches in a phylogenetic tree does not always represent time; it can also represent genetic change.

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What is the significance of fossil records in evolutionary biology?

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Fossil records provide evidence of past life forms and their evolution, helping scientists understand the history of species.

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What is comparative anatomy?

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Comparative anatomy is the study of similarities and differences in the anatomy of different species, which can provide insights into their evolutionary relationships.

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What is genetic analysis?

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Genetic analysis involves examining the DNA sequences of organisms to understand their genetic relationships and evolutionary history.