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Sarkari MCQs Government Exam Question Bank
Question no. 86710

Which cohort would you anticipate displaying the highest IQ concordance?

Select your answer for: Which cohort would you anticipate displaying the highest IQ concordance?
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Answer: B. between identical twins

Explanation

Identical twins develop from a single fertilized zygote and share one hundred percent of their genetic makeup. This complete genetic identity produces the highest possible correlation coefficients on standardized intelligence tests. Comparing identical twins to other relative cohorts provides researchers with clear estimates of genetic influence. Monozygotic twins share identical DNA sequences, making them ideal subjects for behavioral genetic research. Concordance rates measure the statistical similarity of a given trait between paired family members. Behavioral geneticists use these comparison models to partition variance into genetic and environmental components.

Twin studies are a cornerstone of modern behavioral genetics and help quantify the heritability of human traits. Researchers use separated twin studies to isolate genetic influences from shared family environment effects. These findings help clarify the biological underpinnings of cognitive differences across human populations. Fraternal twins share only about fifty percent of their segregating genes, resulting in lower IQ concordance. Non-twin siblings also share roughly fifty percent of their genetic material and show lower concordance than identical twins. Parents and children share fifty percent of their genes but experience generational age gaps affecting environmental similarity.

Subject
Psychology
Category
Psychology
Topic
—
Difficulty
medium

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