Before he was the father of genetics, Gregor Mendel was a struggling student. After he failed his first teaching certification exam in 1850, his abbot sponsored his studies at the University of Vienna from 1851 to 1853. There, he received a unique education. He studied experimental physics under Christian Doppler, who taught him to use mathematical ratios to describe natural phenomena. He also studied botany with Franz Unger, who introduced him to early theories of evolution. This combination was unheard of in biology at the time. When Mendel returned to his monastery, he was a researcher armed with a powerful new idea: that the secrets of life could be counted and predicted with mathematics.
Mendel and His Peas
How a monk discovered the rules of inheritance with pea plants, revealing a near-perfect three-to-one ratio that was ignored for 34 years.
Chapter 1
The Unlikely Scientist
0:46
Part of
Frequently Asked Questions
Why did Gregor Mendel choose pea plants for his experiments?
Mendel chose garden peas because they were easy to grow and featured seven distinct, binary traits, like flower color or seed shape. These traits didn't blend, making patterns of inheritance easier to track. The plants were also self-pollinating, which allowed him to control their parentage precisely for his experiments.
What is the three-to-one ratio Mendel discovered?
When Mendel crossed pure-breeding plants with different traits, he found that the dominant trait appeared in 100% of the first-generation hybrids. In the next generation, produced by self-pollinating those hybrids, the hidden recessive trait reappeared in about one-quarter of the offspring. This created a consistent 3:1 ratio of dominant to recessive traits across thousands of plants.
Why was Mendel's work ignored for so long?
Mendel's 1866 paper was largely ignored for 34 years. Biologists of the era were not accustomed to his mathematical and statistical approach. Furthermore, a key attempt to replicate his findings with hawkweed plants failed because, unknown to him, that plant reproduces asexually. His work was only rediscovered in 1900.
Learn more
To continue the story, download the Chunks Microlearning app
Or get it straight away:
Download on iOS
Download on Android