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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.

Segregation in Fresh Concrete

Segregation in Fresh Concrete

Segregation in fresh concrete is a phenomenon where the components of the concrete mix separate, leading to uneven distribution and compromised structural integrity. This separation typically occurs when concrete is subjected to excessive horizontal movement within forms, or when it is dropped from considerable heights or forced through narrow, winding paths. As a result, heavier coarse aggregate particles settle at the bottom, while lighter, finer materials such as cement and water rise to the...

Plant Hormones

Plant Hormones

Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.

Tonicity in Plants

Tonicity in Plants

Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.

Plant Cell Wall

Plant Cell Wall

The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.

Plant Cells and Tissues

Plant Cells and Tissues

Plant tissues are collections of similar cells performing related functions. Different plant tissues will have their own specialized roles and can be combined with other tissues to form organs such as flowers, fruit, stem, and leaves. Two major types of plant tissue include meristematic and permanent tissue.

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Related Experiment Video

Updated: Feb 10, 2026

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Published on: October 29, 2016

Do plants have a segregated germline?

Robert Lanfear^1,2

¹Ecology and Evolution, Research School of Biology, Australian National University, Canberra, Australia.

|May 17, 2018

Summary

This summary is machine-generated.

The timing of plant germline development, long assumed to be late, may actually be early for many species. Reconciling this with existing knowledge is crucial for understanding plant development and evolution.

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Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

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Published on: April 19, 2018

Area of Science:

Plant developmental biology
Evolutionary biology
Reproductive biology

Background:

The established view posits that the plant germline is segregated late in development.
This long-held belief lacks substantial empirical evidence.
Recent evolutionary theories and studies suggest early germline segregation in plants.

Purpose of the Study:

To investigate the actual timing of germline segregation in plants.
To reconcile conflicting evidence regarding plant germline development.
To establish reliable methods for determining germline segregation timing in diverse plant species.

Main Methods:

Review of existing evolutionary theories.
Analysis of recent empirical studies on plant development.
Exploration of methodologies for germline segregation timing.

Main Results:

Evidence suggests the traditional view of late germline segregation is not well-supported.
Contradictory findings indicate potential early germline segregation in some or most plants.
The study highlights the need for robust methods to determine germline timing.

Conclusions:

The timing of plant germline segregation is a fundamental question with implications for development and evolution.
Revisiting the established view is necessary given new empirical data.
Developing reliable methods is key to advancing our understanding of plant reproductive strategies.