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Related Concept Videos

Nature and Nurture01:10

Nature and Nurture

Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience, such as differences...
Gene-Environment Interactions01:20

Gene-Environment Interactions

Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
Biological Influences on Intelligence01:30

Biological Influences on Intelligence

Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter more...
Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
Natural Selection and Adaptation01:15

Natural Selection and Adaptation

Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations, psychological...
Heritability01:06

Heritability

Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic" a trait is,...

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Determining the Contribution of the Energy Systems During Exercise
11:15

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Published on: March 20, 2012

Nature versus nurture in determining athletic ability.

Tom D Brutsaert, Esteban J Parra

    Medicine and Sport Science
    |August 22, 2009
    PubMed
    Summary

    Both genetics and environment shape athletic ability. Early life environmental influences, like fetal programming, interact with genes during development to determine adult athletic potential.

    Area of Science:

    • Human Genetics
    • Sports Science
    • Developmental Biology

    Background:

    • Human athletic ability is influenced by both genetic (nature) and environmental (nurture) factors.
    • Environmental influences often act through growth and development, interacting with genetic background to shape adult phenotypes.
    • Understanding these complex interactions is crucial for comprehending athletic potential.

    Purpose of the Study:

    • To explore the interplay between genetic predispositions and environmental influences on athletic performance.
    • To review advancements in genetic mapping strategies and their challenges, such as false positives and gene-gene interactions.
    • To examine the role of developmental environmental effects, particularly fetal programming, in shaping adult athletic phenotypes.

    Main Methods:

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    • Review of existing literature on nature vs. nurture in athletic ability.
    • Discussion of genetic mapping strategies, including genome-wide association studies.
    • Analysis of developmental environmental effects and the fetal programming hypothesis.

    Main Results:

    • Genetic factors, including gene-gene interactions and genome structure, significantly influence complex traits like athletic ability.
    • Developmental environmental effects, distinct from common environmental factors, interact with genetics during growth.
    • Fetal programming demonstrates how early life environmental exposures can lead to lasting effects on adult body composition and potentially athletic performance.

    Conclusions:

    • Athletic ability results from a complex interaction between an individual's genetic makeup and environmental exposures, particularly during development.
    • The fetal programming hypothesis offers a model for understanding how early environmental perturbations can influence adult athletic potential.
    • Future research should focus on gene-environment interactions and developmental effects to better predict and enhance athletic performance.