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Related Concept Videos

Mate Choice01:20

Mate Choice

Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.Positive Frequency-Dependent SelectionIn positive...
Natural Selection and Mating Preferences01:06

Natural Selection and Mating Preferences

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.
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
Yeast Signaling01:28

Yeast Signaling

Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
The Ratio of X Chromosome to Autosomes02:45

The Ratio of X Chromosome to Autosomes

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.  
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...

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Related Experiment Video

Updated: Jun 24, 2026

Measuring and Altering Mating Drive in Male Drosophila melanogaster
07:02

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Published on: February 15, 2017

Sexual selection: Fruit first, signals second.

Daniel M Hooper1

  • 1Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA.

Current Biology : CB
|June 22, 2026
PubMed
Summary
This summary is machine-generated.

Ecological shifts, like adapting to fruit-rich diets, paved the way for mating system changes and elaborate sexual traits in Neotropical manakins. This highlights the importance of environmental and physiological factors in sexual selection evolution.

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Area of Science:

  • Evolutionary Biology
  • Ornithology
  • Animal Behavior

Background:

  • Extreme sexual selection drives the evolution of elaborate traits and complex mating systems.
  • Understanding the evolutionary triggers for such diversification remains a key challenge in evolutionary biology.

Purpose of the Study:

  • To investigate the evolutionary sequence of ecological adaptation, mating system changes, and sexual trait elaboration in Neotropical manakins.
  • To identify the preconditions that facilitate the evolution of extreme sexual selection.

Main Methods:

  • Phylogenetic comparative analysis of Neotropical manakin species.
  • Reconstruction of ancestral states for diet, mating systems, and sexual traits.

Main Results:

  • Adaptation to fruit-rich diets was found to precede the evolution of complex mating systems and elaborate sexual traits.
  • Ecological and physiological shifts appear to be crucial preconditions for the evolution of extreme sexual selection.

Conclusions:

  • Ecological factors, specifically dietary shifts, play a foundational role in the evolution of extreme sexual selection.
  • The study underscores the interplay between ecology, physiology, and mating system evolution in driving diversification.