Question

How did Mendel explain that it is possible that a trait is inherited but not expressed in an organism?

Answer 1

Gregor Johann Mendel is known as the father of genetics. Mendel created some laws which were based on the principles of inheritance. He worked with Pea plant, Pisum sativum, for his experimental studies. He discovered that inherited traits are inherited as discrete factors. Later, these factors are termed as genes.

Complete answer:
Mendel formulated an experiment to prove that it is possible that a trait is inherited but not expressed in an organism.
A trait is acquired however it may not be communicated in a life form. At the point when male and female meet up, another generation is delivered. One is a prevailing attribute (dominant, T) and the other is a latent quality (recessive, t). The latent quality doesn't communicate when the predominant characteristic is available. Thus, it is conceivable that one quality might be acquired however it won't be communicated in the life form.

In Mendel's trial, when pure tall pea plants are crossed with pure dwarf pea plants, only tall tea plants are observed in the F1 generation. On selfing the pea plants of the F1, we get both tall and dwarf pea plants in the F2 generation. The return of the dwarf pea plants in the F2 demonstrates that the dwarf(recessive) characteristic was acquired by the life form however not communicated in the F1 age and only dominant character was expressed.

Below is the table representing the cross:
Parent generation- TT(Tall, male), tt(Dwarf, Female)
Gametes- T, t
F1 generation after crossing-Tt (Tall), Tt(Female)
Gametes- T, t and T,t

| T(Tall)| t(Dwarf)
---|---|---
Male gametes (T)| TT| Tt
Female gametes (t)| Tt| tt

Note: Punnett square is used to predict the outcome of simple genetic crosses. The genotypic ratio is estimated to be 1:2:1 and the phenotypic ratio is estimated to be 3:1. The above example is that of the Law of Segregation as it satisfies the requirements.