BIO 326 Lecture Notes - Lecture 8: Wolbachia, Eusociality, Cytoplasmic Incompatibility
21 Dec 2017
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Document Summary
Insects are wildly successful in the area of mating and reproduction, and in some cultures even are regarded as fertility symbols: two forms of reproduction: Asexual reproduction or parthenogenesis produces offspring that are genetically identical to one parent. Insect gametes sperm: sperm are the male gametes, generally produced in the last larval instar, pupal stage, or early adulthood, smaller, more mobile, more numerous gametes compared to eggs, take on a variety of structures. Sex, bugs, and rock and roll: two modes of fertilization: External fertilization in which the egg is fertilized outside the female body (e. g. , silverfish use spermatophores) Internal fertilization (or copulation) in which the egg is fertilized inside the female body. Reproductive conflict: a problem that arises in all this is that males and females have different levels of gametic investment. Eggs are large, costly to produce compared to sperm. Ova are limited resource for females, sperm not limited. Variance in mating success higher in males than females.
