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Related Concept Videos

Incomplete Dominance

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.

Law of Segregation

Law of Segregation

When crossing pea plants, Mendel noticed that one of the parental traits would sometimes disappear in the first generation of offspring, called the F1 generation, and could reappear in the next generation (F2). He concluded that one of the traits must be dominant over the other, thereby causing masking of one trait in the F1 generation. When he crossed the F1 plants, he found that 75% of the offspring in the F2 generation had the dominant phenotype, while 25% had the recessive phenotype.

Dihybrid Crosses

Dihybrid Crosses

Speciation Rates

Speciation Rates

Chi-square Analysis

Chi-square Analysis

The chi-square test is a statistical hypothesis test. It is used to check whether there is a significant difference between an expected value and an observed value. In the context of genetics, it enables us to either accept or reject a hypothesis, based on how much the observed values deviate from the expected values.
The chi-square test was developed by Pearson in 1990.
The first step of performing a Chi-square analysis is to establish a null hypothesis, which assumes that there is no real...

Epistasis

Epistasis

In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...

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Related Experiment Video

Updated: Nov 18, 2025

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments

Published on: May 21, 2019

Fragmentary Blue: Resolving the Rarity Paradox in Flower Colors.

Adrian G Dyer¹, Anke Jentsch², Martin Burd³

¹School of Media and Communication, RMIT University, Melbourne, VIC, Australia.

Frontiers in Plant Science

|February 8, 2021

Summary

This summary is machine-generated.

Blue flowers are more common than humans perceive. Considering bee vision, which favors short-wavelength colors, blue flowers are frequent signals in nature, driven by pollinator competition and resource availability.

Keywords:

biogeography blue elevation flower color land use plant diversity productivity

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Area of Science:

Ecology
Evolutionary Biology
Animal Behavior

Background:

Blue is a favored human color, but less common in flowers, influencing scientific perception.
Human cultural significance of blue may bias scientific evaluation of natural signals.
Most animals, like bees, have different color vision than humans, with preferences for short-wavelength colors.

Purpose of the Study:

To review the cultural and scientific perception of blue in nature.
To analyze the role of animal vision, particularly bee vision, in the evolution of flower color.
To provide new perspectives on the frequency and adaptive value of blue flowers.

Main Methods:

Literature review on blue's cultural significance and scientific evaluation.
Discussion of animal color vision, focusing on bee photoreceptors and preferences.
Analysis of ecological factors driving the evolution of blue flowers, such as pollinator competition and resource availability.

Main Results:

Human perception of blue's rarity in flowers is influenced by cultural biases.
Bee pollinators possess trichromatic vision (UV, Blue, Green) and prefer short-wavelength colors.
Competition for pollinators and resource availability can drive the evolution of blue flowers.

Conclusions:

Understanding natural signaling requires considering biologically relevant observers, not just human perception.
Blue flowers are frequent in nature when considering the color vision and preferences of bee pollinators.
The adaptive value of blue flowers is reinforced by environmental factors and pigment synthesis costs.