I thinking the answer was for some genes, both alleles express together. Others combine to give an average phenotype....
Deep inside the core of the sun, protons can collide into eachother with enough speed that they stick together to form a helium nucleus and generate a big amount of energy at the same time.
Just like the bacteria, the archaea have evolved a diverse array of metabolic pathways. As extremophiles, their metabolism shows many adaptations to the extreme environments of their habitat. There are facultative and obligate anaerobes and aerobic organisms in this kingdom.
Gregor Mendal is known as the father of genetics. Mendal while a monk, used math to discover the basics of heredity by crossing pea plants with different characteristics for the f1 generation but when he crossed the f1 generation with a different pea plant he realized the traits that were in the original crossing to get f1 generation didn't show up until the f2 generation.
