Question : How do Mendel's experiments show that traits may be dominant or recessive? explain it with the help ofa cross.

Question : How do Mendel's experiments show that traits may be dominan

1.	Question : How do Mendel's experiments show that traits may be dominant or recessive? explain it with the help ofa cross.
Answer» Solution :When two pure bred parents with different traits for a CHARACTER is CROSSED, they always give rise to a Fl hybrid in which phenotypically the dominant trait is expressed. . When this hybrid is self fertilised, 75% of the F2 generation will have a trait which is dominant and a mere 25% will have the recessive trait. Eg: Crossing of HOMOZYGOUS tall plants with short plants give heterozygous tall plants (hybrid) in the Fl generation. This shows that tallness is a dominant trait in pea plants. When these hybrid plants are self fertilised, they give rise to tall and short plants in the PHENOTYPIC ratio of 3:1. So trait for shortness is considered recessive.