Gregor Mendel experimented with hundreds of pea plants to understand the process of heredity.
The Correct Answer and Explanation is:
Gregor Mendel, known as the “father of modern genetics,” conducted groundbreaking experiments with pea plants to uncover the principles of heredity. His work laid the foundation for our understanding of how traits are passed from one generation to the next.
Correct Answer: Mendel used pea plants (Pisum sativum) in his experiments to study heredity.
Explanation:
Mendel chose pea plants for several reasons that made them ideal for studying heredity. First, pea plants have distinct, easily observable traits, such as flower color (purple or white), seed shape (round or wrinkled), and pod color (green or yellow). These contrasting traits allowed Mendel to track how each trait was inherited over generations. Additionally, pea plants can self-pollinate and cross-pollinate. This feature enabled Mendel to control the breeding process and produce offspring with known parentage, ensuring accurate observations of trait inheritance.
Mendel’s experiments followed a systematic approach. He began with purebred plants, ensuring that each plant bred true for a specific trait. For example, he used plants that consistently produced purple flowers and plants that consistently produced white flowers. When he cross-pollinated these plants, he observed that the first generation (F1) showed only one of the two traits (dominant trait), while the second generation (F2) displayed a mix, with the dominant trait appearing in about three-quarters of the offspring and the recessive trait in one-quarter.
Through his experiments, Mendel discovered two fundamental laws of heredity: the Law of Segregation and the Law of Independent Assortment. The Law of Segregation states that an organism inherits two copies of each gene, one from each parent, and these copies separate during gamete formation. The Law of Independent Assortment asserts that traits are passed on independently of each other. Mendel’s findings challenged the prevailing theories of blending inheritance, showing instead that traits are inherited as discrete units, now known as genes.
Although his work was not recognized until decades later, Mendel’s pea plant experiments established the principles of modern genetics and revolutionized our understanding of biological inheritance.