Question | Answer |
Heredity and evolution | *Acquired traits: It is experienced by an organism in its life. It involves changes in non-reproductive cells, somatic cells. It is not passed down to the progeny. *Inherited trait: It is passed down from an ancestor. It involves a change in DNA. *Heredity is defined as the transmission of characteristics from one generation to the other. |
*An accidental change in the frequency of genes in a small population is called a genetic drift. *Homologous organs: Same in structural form but perform different functions. Eg. The arm of humans and wings of birds. *Analogous organs: Different structure but perform similar functions. Eg. Wings of birds and wings of insects. | |
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