Beautiful british parents have more daughters
1Department of Management, London School of Economics and Political Science, UK. S.Kanazawa@lse.ac.uk
Physically attractive parents tend to have more daughters, while less attractive parents tend to have more sons. This finding supports the Trivers-Willard hypothesis regarding parental traits and offspring sex ratios.
Area of Science:
- Evolutionary Biology
- Human Behavioral Ecology
- Reproductive Strategies
Background:
- The Trivers-Willard hypothesis posits that parents adjust offspring sex ratios based on heritable traits influencing reproductive success.
- Physical attractiveness is a heritable trait that disproportionately enhances female reproductive success.
Purpose of the Study:
- To test the generalized Trivers-Willard hypothesis concerning physical attractiveness and offspring sex ratio.
- To investigate if attractive parents have more daughters and unattractive parents have more sons.
Main Methods:
- Analysis of the prospectively longitudinal National Child Development Study (NCDS) in the United Kingdom.
- Teacher ratings of physical attractiveness at age 7 were correlated with offspring sex ratios 40 years later.
Main Results:
- Children rated as attractive at age 7 had 23% higher odds of having a daughter later in life.
- Children rated as unattractive at age 7 had 25% higher odds of having a son later in life.
Conclusions:
- Findings support the Trivers-Willard hypothesis, linking parental physical attractiveness to offspring sex ratios.
- Suggests evolutionary implications for the average attractiveness of sexes over time.
More Related Videos
13:04In Vivo and Ex Vivo Approaches to Study Ovarian Cancer Metastatic Colonization of Milky Spot Structures in Peritoneal Adipose
Published on: October 14, 2015
06:16Involving Individuals with Developmental Language Disorder and Their Parents/Carers in Research Priority Setting
Published on: June 6, 2020
Related Concept Videos
Pedigree Analysis
Pedigree Analysis
Probability Laws
Parenting Styles
Authoritarian Parenting
This style is strict and controlling, with little room for open dialogue. Authoritarian parents demand obedience and often enforce rules with minimal warmth. Children raised this way may lack social skills and initiative, usually comparing themselves to others unfavorably.
Authoritative Parenting
This...
Natural Selection and Mating Preferences
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...
X-linked Traits
