BIO 203 Lecture Notes - Lecture 21: Centre For Addiction And Mental Health, Sexual Differentiation, Aldosterone

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Genes come from one parent without fusion of egg and sperm: usually relies on mitotic cell division. Advantages: allows animal in isolation to reproduce without locating mates, can be very rapid (colonization, advantageous in stable, favorable environments because genotypes are perpetuated precisely. Not to say that they can"t survive in unstable environments but just not as favorable for them. Fission separation of parent into two or more individuals or approximately equal size: most common form of asexual reproduction. Budding new individuals splitting off from existing ones (offspring may or not detach) Fragmentation breaking of body into several pieces each of which may develop into complete adults: must be followed by regeneration, the regrowth of lost body parts. Genetic makeup of offspring is identical to the parent. Ex: sea anemone undergoing reproduction by fission. Animals may reproduce exclusively asexually or sexually: or they may alternate between the two.

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