Theory of pangenesis was given by-

Charles Darwin proposed Pangenesis in 1868 (The Variation of Animals and Plants under Domestication). He suggested all body parts release tiny particles called gemmules that circulate (likely via blood), collect in the gonads, and shape gametes, thereby transmitting traits including acquired ones to offspring.

Key points

• Gemmules: Hypothetical particles produced by every cell.
• Transport: Circulate through the body and aggregate in reproductive organs.
• Heredity: Traits arise from gemmule mixtures in gametes.
• Acquired traits: Aimed to explain Lamarckian inheritance.
• Fate: Later discarded, replaced by chromosomal and Mendelian genetics.