IB Diploma Biology Practice Test 2026 – Your All-in-One Resource for Exam Success!

The term that describes the offspring produced by crossing two parental generation (P generation) parents is indeed the F1 generation. In genetics, the P generation refers to the original set of parents used in a breeding experiment. When these P generation parents are crossed, the resulting offspring are designated as the F1 generation, where "F" stands for "filial," meaning "offspring."

The F1 generation typically exhibits a mix of traits from both parents but demonstrates a dominant trait if one parent is homozygous for a dominant allele and the other is homozygous for a recessive allele. Understanding this concept is crucial in the study of inheritance patterns as it sets the stage for further generations, such as the F2 generation, which comes from crossing two individuals of the F1 generation.

Thus, the association of the F1 generation with the results of a direct cross between P generation parents is a key principle of Mendelian genetics.