Question

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Answer 1

Hey dear......
Here is the complete explanation of your question...

Mendel first crossed pure-bred tall pea plants with pure bred dwarf pea plants and found that only tall pea plants were first produced in the first generation or F1 generation. No dwarf pea plant were obtained in the first generation of the progeny. From this Mendel concluded that the first generation (F1 generation) showed the traits of only one of the parent plants : tallness. The trait if the parent plant did not show up in the progeny of first generation.

Mendel then crossed the tall pea plants of the F1 generation and found that tall plants and dwarf plants were obtained in the second generation (F2 generation) in the ratio of 3:1. In other words, in F2 generation, three fourth plants were tall and one fourth were dwarf. Mendel noted that the dwarf trait of the parent pea plant which had seemingly disappeared in the first generation progeny, reappeared in the second generation.

Mendel said that the trait of dwarfness of one of the parent pea plant had not been lost, it was merely concealed or suppressed in the first generation to re-emerge in the second generation. Mendel called the repressed trait of 'dwarfness' as "recessive" and the expressed trait of 'tallness' as "dominant" .

In this way, Mendel's experiment showed that the traits may be dominant or recessive.

Hope that all this is clear to you.....
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