anisogamy


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Words related to anisogamy

(biology) reproduction by the union or fusion of two differing gametes (especially differing in size)

References in periodicals archive ?
4, 40) In addition, the difference in size between male and female gametes in anisogamous and oogamous organisms showed that contribution to the progeny of the male organellar genome (DNA) is small, while that of female gametes is large, suggesting that anisogamy and oogamy reinforce maternal inheritance.
One possible exception to this rule is the divergence in gamete size between sexes in all animals, but recent theory suggests that sperm limitation coupled with selection on increased zygote size can result in anisogamy without direct sperm competition or Bateman's principle (Levitan 1996b, 1998).
Early models of anisogamy suggested that small sperm size would be favored when there is a risk of sperm competition (defined as occurring whenever females copulate with more than one male during a single period of female fertility; Parker 1970).
Anisogamy, however, allows males to contribute nothing but genes to their offspring.