Mendel's Evidence for Particulate Inheritance

The question asks who first presented evidence for the particulate nature of the units of inheritance. This concept refers to the idea that hereditary traits are passed down in discrete units, rather than blending.

Gregor Mendel, through his meticulous experiments with pea plants conducted in the mid-19th century, provided the foundational evidence for this principle. He observed that traits appeared in predictable patterns and proposed that they were controlled by distinct "factors" (later termed genes) that retained their identity across generations. This directly contradicted the prevailing "blending" theory of inheritance.

• Mendel's experiments demonstrated that these factors (units of inheritance) were passed down intact.
• This provided strong support for a particulate model of inheritance.
• Therefore, Gregor Mendel is credited with presenting the first evidence for the particulate nature of inheritance.

The other scientists listed made significant contributions later: Correns was one of the rediscoverers of Mendel's work; Morgan extensively studied inheritance using fruit flies, confirming and extending Mendelian principles and discovering sex-linked inheritance; Mojica is known for his work on CRISPR technology.