The plants bearing round yellow coloured (RrYy) seeds are self pollinated. Represent the result obtained in the F_(2) generation of dihybrid cross with the help of a checker board. Mention the varieties of plants obtained in F_(2) generation. OR What is evolution ? Explain the three evidences for evolution.

The plants bearing round yellow coloured (RrYy) seeds are self pollina

1.	The plants bearing round yellow coloured (RrYy) seeds are self pollinated. Represent the result obtained in the F_(2) generation of dihybrid cross with the help of a checker board. Mention the varieties of plants obtained in F_(2) generation. OR What is evolution ? Explain the three evidences for evolution.
Answer» Solution : OR Evolution is the process of change from simple life forms to complex Life forms by gradual change. It is generating DIVERSITY and SHAPING the diversity. Three factors / evidences and their roles. (i) Analogous organs : The analogous organs have different basic design and structurebut perform similar functions. e.g., The wings of insects and the wings of birds. (ii) Homologous organs : The homologous organs have similar basic design and structure but perform different functions. e.g., Forelimbs of a frog, lizard, bird and man (iii) Fossils: Allow us to make estimates of how FAR back evolutionary relationships GO. Fossils when chronologically arranged help in TRACING the evolutionary history of an organism. e.g., Archaeopteryx looks like a bird but it bears many characters of reptiles. This proves that birds have evolved from reptiles.