Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

By what chance was Gregor Mendel deservedly recognized as the founder of the theory of heredity? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Comments on the article Comments on the article

Did you know?

By what chance was Gregor Mendel deservedly recognized as the founder of the theory of heredity?

In the middle of the 1822th century, the Austrian monk and amateur botanist Gregor Mendel (1884-XNUMX) conducted experiments on crossing (through artificial pollination) plants of the same species (at first it was peas, later - beans) with different characteristics.

Mendel was interested in how, after crossing, such traits as the color of peas (green and yellow), their appearance (smooth and wrinkled), and the length of the plant stem (long and short) are transmitted to subsequent generations.

Within 8 years, Mendel made 355 experiments and received about 13 thousand mutant plants, carefully recording the results of observations, which allowed him to draw conclusions that we still call Mendel's laws. In 1863, he completed the experiments, carefully described their results, and sent a copy to the then highly respected German botanist Carl Wilhelm von Nägel.

The professor considered the conclusions of an unknown amateur, moreover, obtained on the basis of a simple count of plants, not worthy of attention and gave them a negative review. In 1866, Mendel published the results of his research in one of the provincial Austrian journals, but this publication did not attract the attention of his contemporaries either. The double failure discouraged Mendel, and he returned to his monastic duties, abandoning his studies.

The name of Mendel and his achievements would probably have remained unknown to posterity if one of the most amazing cases in the history of science had not occurred three decades later. In the same year, at least three people - the Dutchman Hugo de Vries, the German Carl Erich Correns, and the Austrian Erich von Tschermak - independently arrived at the same conclusions as Mendel.

Not being familiar with each other or with the work of Mendel, all three in 1900 prepared materials for publication; all three, while working with the literature on this topic, to their great surprise, came across an article by Mendel; all three published their material in the same 1900. And all three referred to the publication of Mendel, thereby giving him the palm and relegating their work to the rank of only confirming the discovery made earlier.

Author: Kondrashov A.P.

 Random interesting fact from the Great Encyclopedia:

What did the philosopher Auguste Comte consider the most striking example of such knowledge, which will forever remain hidden from man, and why was he wrong?

In 1844, the philosopher Auguste Comte (1798-1857) was looking for an example of such knowledge that would forever remain hidden from mankind. He focused on the chemical composition of distant stars and planets. Comte believed that a person would never visit them and, having no samples of a substance in his hands, was forever deprived of the opportunity to know its composition.

Auguste Comte chose an extremely unfortunate example. Just three years after his death, it became clear that the spectrum of their radiation could be used to determine the chemical composition of distant objects.

Astronomical spectroscopy made it possible to determine the composition of the gas shells of the planets of the solar system, the chemical composition of the Sun, distant stars and galaxies.

 Test your knowledge! Did you know...

▪ What is botany?

▪ What is a cloud?

▪ What did the Everton football club call its store, joking with the main rival?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Mitsubishi DLP projector 19.12.2003

Mitsubishi Electric Corporation has introduced a new model of DLP projector - LVP-D2010.

The main characteristics of the projector are as follows: brightness - 560 lumens (ANSI), lamp power 250 W, contrast ratio 3600:1, noise level - 28dB. To connect external devices there is digital DVI, two component (BNC and RCA), S-Video and composite video inputs. Projector dimensions - 305 x 150 x 430 mm, weight - 7,8 kg. LVP-D2010 has a 1,35x optical zoom, 1-megapixel matrix provides a resolution of 1280x720 pixels.

The DLP projector will hit the Japanese market at the end of November for a suggested retail price of $8500.

Other interesting news:

▪ MATSUSHITA completely switched to lead-free boards

▪ Children's shoes with a GPS tracker

▪ The phases of the moon affect rainfall

▪ Professions disappearing and promising

▪ A new way to feel touch

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Electricity for beginners. Article selection

▪ article Daily bread. Popular expression

▪ article In what language is the concept of the time axis the opposite of what we are used to. The future is in front, the past is behind? Detailed answer

▪ article Weigher of railway cars. Standard instruction on labor protection

▪ article Tube UMZCH with deep environmental protection. Encyclopedia of radio electronics and electrical engineering

▪ article Power supply, 12 volts 6 amps. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024