A chromosome that fails to pair with another during the prophase stage of meiosis, and therefore does not exchange genetic information via crossing over. This situation usually occurs in polyploids with an odd chromosome compliment, such as triploids.
The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..
Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..
This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..