How Youâll Know if Something is Wrong. Symptoms are typically related to the cause of the high white blood cell count. If the cause is an infection, symptoms will typically appear as fever, lack of appetite, moodiness, and fatigue. If the infection is external there may be a rash, wound, or abscess.
Sexual reproduction is able to generate genetic variation in offspring because the process of meiosis randomly shuffles genes across chromosomes and then randomly separates half of those chromosomes into each gamete. The two gametes then randomly fuse to form a new organism.Genetic variation is one of the keys to evolutionary fitness. This is made possible because reproductive cells undergo meiosis, which is the process in which one cell divides twice to produce four sperm or four eggs.he two gametes then randomly fuse to form a new organism. Genetic variation is one of the keys to evolutionary fitness. This is made possible because reproductive cells undergo meiosis, which is the process in which one cell divides twice to produce four sperm or four eggs.
The mechanisms of reproductive isolation or hybridization barriers are a collection of mechanisms, behaviors and physiological processes that prevent the members of two different species that cross or mate from producing offspring, or which ensure that any offspring that may be produced are sterile.ny of the factors that prevent potentially fertile individuals from meeting will reproductively isolate the members of distinct species. The types of barriers that can cause this isolation include: different habitats, physical barriers, and a difference in the time of sexual maturity or flowering.