How do Mendel's experiments show that traits are inherited independently??
difference between inherited and acquired trait????
Mendel crosses varieties of pea plants that differed in more than one characters from each other by two pairs of genes. This is called dihybrid cross. By performing this cross he stated the law of independent assortment which explains that alleles of different genes are assorted independently of each other at the time of gamete formation. In monohybrid cross produces two phenotypes (3:1) whereas dihybrid cross produces four phenotypes in the ratio of 9:3:3:1. This 9:3:3:1 ratio also shows that the two different genes independently express the phenotypic ratio of 3:1 each. This proves that all the traits in an organism are inherited independently.
Inherited traits: The traits or characters that are passed from parents to their children by the genes are termed as inheritance. E.g. eye colour, hair type etc.
Acquired Trait: These are the characteristics that are acquired by the organisms in their life time, to survive successfully or in a better way. These characteristics are not transferred to the next generation. For example, large muscle size of a person is acquired by doing exercise and cannot be passed to the next generation. It is an acquired character.
- when Mendel crossed pure bred tall plant with pure bred short plant then only tall plants were seen in the F1 gen hence he concluded that only one parental trait was expressed. later in the F2 progeny 3/4th plants were tall and the others short.....hence it concluded that the plants in the F1 progeny had both traits but only tallness was expressed.....there were no medium size plants or mixtures what it was found only tallness and shortnessl....therefore the traits were inherited independently.
These traits are inherited by a person from his ancestors
it involves changes in DNA
it is transmitted to the progeny
Eg. shape of nose,hair colour etc
they are experienced by a person during his lifetime
it involves changes in non reproductive or somatic cells
it is not transmitted to the progeny
Eg. the tails of mice are cut...ofcourse their next gen would take birth with a whole tail