Behavioral Ecolog2 - Behavioral Ecology Sexual Behavior Is...

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Unformatted text preview: Behavioral Ecology Sexual Behavior Is Sex Necessary? Since most of the living things we encounter in our daily lives, from our pets to the flowers in our gardens, undergo some form of sexual reproduction, it is easy to think that this is simply the way things are done. However, not all organisms sexually reproduce. Parthenogenesis, literally "virgin origin", is a common reproductive strategy. It is mostly seen in small organisms, such as insects and bacteria. Such asexual reproduction results in clone-like offspring that are genetically identical to the parent. In species that reproduce asexually, evolution results only from mutation of parental genetic material. In many ways asexual reproduction is actually a better reproductive strategy than sexual reproduction. Sex can be quite costly. In fact, it is doubly costly, since both parents suffer the cost for producing only one offspring. While sexual reproduction allows for the mixing of the parental genes to create genetically diverse offspring, it can result in the loss of favorable genes,...
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