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Related Concept Videos

Criticisms of the Evolutionary Perspective01:23

Criticisms of the Evolutionary Perspective

In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
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The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
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In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.  
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A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...
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Biopsychology serves as a vital bridge connecting the intricate domains of biology and psychology, shedding light on how biological systems influence psychological phenomena. This field scrutinizes the biological substrates of behavior and mental processes, emphasizing the nervous system along with the roles of neurotransmitters, hormones, and genetics. It also incorporates evolutionary perspectives to explain the adaptive nature of mental functions.
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Sex Linked Disorders01:43

Sex Linked Disorders

Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.

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Sex Stratified Neuronal Cultures to Study Ischemic Cell Death Pathways
10:44

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Published on: December 9, 2013

Systems biology asks new questions about sex differences.

Arthur P Arnold1, Atila van Nas, Aldons J Lusis

  • 1Department of Physiological Science, University of California, Los Angeles, CA, USA. arnold@ucla.edu

Trends in Endocrinology and Metabolism: TEM
|September 29, 2009
PubMed
Summary

Sex differences in physiology and disease susceptibility arise from hormones and sex-linked genes. Systems biology approaches reveal sex-specific gene network organization, offering new insights into disease risk.

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Area of Science:

  • Genomics
  • Systems Biology
  • Sex Differences Research

Background:

  • Biological sex significantly impacts physiological processes and disease outcomes.
  • Key factors contributing to sex differences include gonadal hormones and sex chromosome-linked genes.
  • Understanding these differences is crucial for personalized medicine and disease prevention.

Purpose of the Study:

  • To investigate genome-wide sex differences in gene network organization.
  • To identify functionally related gene modules with differential expression in males and females.
  • To explore sex-specific regulatory elements within the genome.

Main Methods:

  • Application of novel systems biology approaches for genome-wide analysis.
  • Analysis of gene coexpression patterns across sexes.
  • Identification of regulatory genomic sites influencing sex-specific gene networks.

Main Results:

  • Discovery of functionally related gene modules exhibiting distinct coexpression patterns between males and females.
  • Identification of genomic regions regulating gene networks in a sex-specific manner.
  • Demonstration that aggregate gene behavior analysis reveals novel sex differences.

Conclusions:

  • Systems approaches provide a comprehensive view of sex differences in gene regulation.
  • These findings enhance our understanding of sex-biased disease susceptibility.
  • The study highlights the importance of sex as a biological variable in biomedical research.