Flashcards in Gregor Mendel And The Laws Of Inheritance (T3) Deck (3):
How was Gregor Mendel able to establish the laws of inheritance?
He noticed that many of the features of pea plants had just two alternative forms, eg: tall or short purple or white flowers etc..
He found that if he bred red-flowered plants with white flowered plants, all the offspring would be red.
However, if he then bred the plants from the first generation with each other, most would be red but some would be white.
This was because the allele (the heritable unit) for red flowers was dominant while the allele for white flowers was recessive.
From his experiments with plants, what two main features did Gregor Mendel note about inheritance?
- all the plants of the first generation (F1) were always of one type
- there was always a 3:1 ratio of type in the second generation