Question at position 5 What is the most important determinant of genetic differences between populations of humans across the world?Local adaptationEthnicityRaceGeographic distanceClear my selection单项选择题
A
Local adaptation
B
Ethnicity
C
Race
D
Geographic distance

Question

Question at position 5 What is the most important determinant of genetic differences between populations of humans across the world?Local adaptationEthnicityRaceGeographic distanceClear my selection

BlackTom AI · Accepted Answer

Question at position 5 asks: What is the most important determinant of genetic differences between populations of humans across the world?
Option 1: Local adaptation. While local adaptation can shape certain allele frequencies in response to environment, it is not the overarching determinant of global genetic differences. The broad pattern across many populations is driven more by historical separation and limited gene flow, with selection playing a role at specific loci rather than redefining overall population structure.
Option 2: Ethnicity. Ethnicity is a social construct and does not correspond neatly to discrete biological boundaries. Genetic variation does not map neatly onto ethnic labels, so this choice overstates the role of socially defined groups in determining overall genetic differences.
Option 3: Race. Like ethnicity, race is not a precise or reliable predictor of genetic differences among human populations. Genetic variation often shows gradual change rather than sharp boundaries, so race is not the most important determinant of global genetic differentiation.
Option 4: Geographic distance. This option reflects the well-supported concept of isolation by distance: as populations are physically further apart, gene flow decreases and genetic differences accumulate due to drift and historical separation. Geographic distance is broadly correlated with patterns of genetic differentiation across human populations and is considered a primary determinant among the options listed.

Question at position 5 What is the most important determinant of genetic differences between populations of humans across the world?Local adaptationEthnicityRaceGeographic distanceClear my selection单项选择题

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