Question

how do mendel's experiment shows that traits may be dominant or recessive?...................please answer me fast......

Answer 1

by the experiment of rats
he cut off tails of female rats but they gave birth to the rats with tails...

Answer 2

Dominant or recessive trait can be explained with the help of an example
When we consider a pea plant with tall and dwarf character and cross them
ie; genotype. TT. × tt
Phenotype. Tall. × dwarf
Gametes. (T). (t)
F1 generation
Genotype. Tt
Phenotype. Tall
In first generation we got all plants tall
Now when we self pollinate them
Genotype. Tt. × Tt
Phenotype. Tall. Tall
Gametes. (T) (t). (T). (t)
F2 generation.
Genotype. TT. , Tt. , Tt. , tt
Phenotype. Tall. Tall. Tall. Dwarf
When we self cross them we get a tall and dwarf plant with the parents character and two character which is intermediate to them
We can conclude that the trait which expresses in the F1 generation is termed as dominant trait (tall). and the trait which gets hidden in F1 generation but gets expressed in F2 generation can be termed as recessive trait ( dwarf).


Hope you understand
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