MP Board · Class 10 · Science · Heredity and EvolutionExplain Gregor Mendel's contribution to the understanding of heredity with reference to his choice of the garden pea plant.

Gregor Mendel, known as the Father of Genetics, conducted pioneering hybridization experiments on the garden pea plant (Pisum sativum) and formulated the fundamental laws of inheritance. His choice of the garden pea plant was exceptionally strategic and played a pivotal role in the success of his experiments. Firstly, pea plants possess several distinct, easily identifiable contrasting characters, such as tall or dwarf height, round or wrinkled seeds, and purple or white flowers, which made observation and data collection straightforward and unambiguous. Secondly, pea plants normally reproduce by self-pollination, which allowed Mendel to easily obtain pure-breeding varieties with homozygous traits over generations. Thirdly, they can also be cross-pollinated artificially quite easily, enabling him to study the inheritance patterns of combined traits. Fourthly, pea plants have a short life cycle and produce a large number of offspring in a single generation, which provided ample statistical data to establish mathematical ratios for trait inheritance. Finally, they are easy to cultivate and occupy little space in the garden. Through careful documentation and statistical analysis of these crosses, Mendel proposed the Law of Segregation and the Law of Independent Assortment, laying the robust foundation for modern genetics.