An inability to adapt to its environment would likely be the most common.
They risk dying out, or they move to another environment
They become extinct.
it becomes extinct
This is likely the word "extinct", which is applied to past species of organisms that have died out. Another possible word would be "instinct" (an automatic response, as in animals).
The appearance of a hereditary trait would be called the organisms phenotype. The morphological and behavioral characteristics of the organism.
A sense of humor
Organisms in the same scientific order would have the most similar traits.
The offspring would have a 50% chance of being heterozygous and showing the dominant trait and a 50% chance of being homozygous for the recessive trait.
lichens
Heterozygous.
because a food source can become extinct and if the other organisms only food source becomes extinct the species would starve and become extinct and other species will become extinct as well.
The allele would not be passed on to further generations, as the organism cannot reproduce. There would be a smaller population of that organism who's genetic code does not contain the allele for that particular trait.