Q.What are the reasons for the success of Mendel?

Mendel succeeded because he chose the garden pea (a self-pollinating plant with sharply contrasting, easily distinguishable traits), used a large sample size, applied statistical/mathematical analysis, studied one or...

Mendel's success came from careful experimental design and choice of material, not luck.

Several factors contributed to Gregor Mendel's success where earlier plant hybridizers had failed: (1) He selected the garden pea (Pisum sativum), a plant that is normally self-pollinating (ensuring pure lines) but can also be easily cross-pollinated artificially. (2) He chose seven pairs of clearly contrasting, easily distinguishable characters (e.g., tall/dwarf, round/wrinkled seeds) rather than vague or continuously varying traits. (3) He maintained true-breeding parental lines before crossing. (4) He studied the inheritance of one character (monohybrid) or a limited number of characters (dihybrid) at a time rather than the whole organism at once. (5) He kept accurate, quantitative records and analyzed the results mathematically/statistically over large numbers of offspring, which revealed the numerical ratios (3:1, 9:3 …