What do we call the first generation of offspring obtained from an experimental cross of two organisms?

The first generation of offspring obtained from an experimental cross of two organisms is known as the F1 generation. This terminology comes from the field of genetics and is commonly used to describe the direct offspring resulting from a parental (P) generation cross. The F1 generation typically exhibits phenotypes that are a combination or a mix of the traits of the parent organisms, allowing scientists to study inheritance patterns and trait dominance.

In contrast, the P generation refers to the original parents, while the F2 generation is the offspring produced when the F1 generation is interbred. The term hybrid generation is less standardized and usually describes organisms that have been produced from a cross between two different species or varieties, rather than indicating a specific generation. Understanding the definitions and sequences of these generations is crucial for grasping fundamental concepts in genetics, such as Mendelian inheritance.