Question at position 21 What is the most important determinant of genetic differences between populations of humans across the world?RaceEthnicityGeographic distanceLocal adaptationClear my selection单项选择题
A
Race
B
Ethnicity
C
Geographic distance
D
Local adaptation

Question

Question at position 21 What is the most important determinant of genetic differences between populations of humans across the world?RaceEthnicityGeographic distanceLocal adaptationClear my selection

BlackTom AI · Accepted Answer

To approach this question, consider what primarily shapes the overall genetic differences observed among human populations globally.
Option 1: Race. This is a social construct rather than a robust biological determinant of genetic differentiation. Genetic variation exists on a continuum and does not align neatly with racial categories, so this choice misrepresents how populations differ at the genetic level.
Option 2: Ethnicity. Like race, ethnicity reflects cultural and social identifiers rather than being a direct driver of genome-wide differences. While historical migrations and admixture can correlate with ethnic groupings, ethnicity itself does not causally determine the level of genetic divergence across populations.
Option 3: Geographic distance. This is a strong, well-supported determinant because gene flow tends to decrease with increasing distance between groups (isolation by distance). Over generations, nearby populations exchange more genes, while distant populations accumulate differences, making geographic distance a key predictor of genetic differentiation.
Option 4: Local adaptation. Local adaptation explains how populations diverge in response to specific environmental pressures, but it is one mechanism that contributes to differences rather than the primary global determinant of all genetic differences among populations. It operates within and between groups rather than accounting for the broad, baseline pattern of differentiation driven by distance and gene flow.
In summary, geographic distance best accounts for the broad pattern of genetic differences observed between human populations worldwide, because it governs the extent of gene flow and separation over time, whereas race and ethnicity reflect social constructs, and local adaptation explains specific selective outcomes rather than the foundational structure of global genetic variation.

Question at position 21 What is the most important determinant of genetic differences between populations of humans across the world?RaceEthnicityGeographic distanceLocal adaptationClear my selection单项选择题

类似问题

Which of the following is a factor that, by itself, is least likely to promote widespread changes in allele or genotype frequencies in a large population?

A population geneticist is studying a population of pea aphids and wants to determine whether the proportion p of aphids that are resistant to a particular insecticide is less than 0.40, the proportion reported in a previous study. Which pair of hypotheses is appropriate for this test?

In natural populations, most genes are

Which of the following is a factor that does not promote widespread changes in allele or genotype frequencies?

The Greater prairie chicken population in Illinois is a living example of which of these ?

A population that is infinitely large and in which mating is completely random is mostly likely to:

Question at position 14 Genetic diversity amongst human populations is best explained by __________.cultural differencespopulation sizeethnicityracial categorizesgeographic distanceClear my selection

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单