a How do Mendels experiments show that traits may be dominant or recessive b How do Mendels experime...

Question

a How do Mendels experiments show that traits may be dominant or recessive b How do Mendels experiments show that traits are inherited independently

Accepted Answer

a Mendel conducted the experiments using or pea plant He selected homozygous tall TT and dwarf tt pea plants He crossed the tall pea plant with the dwarf pea plant It was observed that the F1 generation are all tall plants Thus it was concluded that the gene causing tallness is dominant while the gene causing dwarfness is recessive The trait expressing itself in the hybrid is the dominant one This experiment proves Mendels first law of inheritance It states that when a pair of contrasting factors is brought in a hybrid one factor inhibits the appearance of the other one which inhibits is the dominant one and which is inhibited is recessive b Mendel performed experiments in which he took a tall plant with round seeds and a short plant with wrinkledseeds In F1 They were all tall and had round seeds Tallness and round seeds were thus dominant traits When he used these F1 progeny to generate F2 progeny by selfpollination he found that some F2 progeny were tall plants with round seeds and some were short plants with wrinkled seeds At the same time there were tall plants but had wrinkled seeds while others were short but had round seeds Thus Mendels experiments show that the tallshort trait and the round seedwrinkled seed trait are independently inherited

Lakhmir Singh Solutions Class 10 Biology Solutions for Exercise in Chapter 4 - Heredity and Evolution