Gene Flow
Flashcard
•
Science
•
6th - 8th Grade
•
Hard
Barbara White
FREE Resource
Student preview
13 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Evolution Noun
[ev-uh-loo-shun]
Back
Evolution
The process by which populations of organisms change over generations, leading to the development of new species.
Example: This diagram shows how different groups of animals, like mammals and reptiles, evolved from a common ancestor over millions of years, branching into new species.
2.
FLASHCARD QUESTION
Front
Natural Selection Noun
[nach-er-uhl si-lek-shun]
Back
Natural Selection
The process where organisms better adapted to their environment tend to survive and produce more offspring.
Example: This image shows how different finch species evolved unique beak shapes (a trait) through natural selection to adapt to different food sources on their islands.
3.
FLASHCARD QUESTION
Front
Gene Flow Noun
[jeen floh]
Back
Gene Flow
The addition or removal of genes that occurs when individuals enter or leave a population.
Example: A butterfly from a population of white butterflies moves to a population of pink butterflies, introducing its genes and changing the genetic makeup of the new population.
4.
FLASHCARD QUESTION
Front
Genetic Drift Noun
[juh-net-ik drift]
Back
Genetic Drift
A random change in the gene pool of a population that occurs purely by chance.
Example: A random event, like a foot stepping on beetles, can by chance remove more of one color, changing the gene frequency in the surviving population.
5.
FLASHCARD QUESTION
Front
Mutation Noun
[myoo-tey-shun]
Back
Mutation
A permanent alteration in a DNA sequence that creates a new allele and introduces genetic variation.
Example: This diagram shows a mutation where a segment of a DNA sequence (TAA) is replaced by a different one (GTG), an event called base substitution.
6.
FLASHCARD QUESTION
Front
Gene Pool Noun
[jeen pool]
Back
Gene Pool
The total collection of all genes and their corresponding alleles within a specific population at a given time.
Example: This image shows that a gene pool is the total collection of all the different genes (represented by colored dots) from all individuals (frogs) in a population.
7.
FLASHCARD QUESTION
Front
Allele Frequency Noun
[uh-leel free-kwuhn-see]
Back
Allele Frequency
The percentage or proportion of a specific allele within a population's gene pool, indicating its relative commonness.
Example: These data tables show how allele frequencies change. In Population B, the introduction of Allele A (an example of gene flow) causes its frequency to increase over time.
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