Tag: "hermaphroditic" at biology news

The recombination gender gap

...les of sex-biased recombination. For example, some hermaphroditic species of flatworms lack sex chromosomes altogether but still display marked differences in male and female recombination rates. Lenormand and Dutheil realized that selection was not necessarily limited to the adult stage and that differences in sel...

Sperm trading can resolve hermaphrodite mating conflicts

... the bizarre reproductive conflicts encountered by hermaphroditic animals. In some hermaphroditic species, such as C. hirundinina, mating partners may insist on copulating as a "male," "female," or ...

Pesticide combinations imperil frogs, probably contribute to amphibian decline

...hormone estrogen. He was able to produce identical hermaphroditic malformations in frogs by administering estrogen or blocking androgen at the proper time of development. "One week of exposure at the critical time is all that's required to make these males look feminine, which probably interferes with mating," he s...

Worms under stress

...roducing strains are more pollution sensitive than hermaphroditic strains. This in turn has a negative effect on the population growth rate. Alda Alvarez also observed that following the pollution, the toxicity of the nematodes does not increase but is variable. Gene regulation Additionally from a genetic viewp...

New clues to how sex evolves

... they're on. It could be that C. elegans, which is hermaphroditic and grows to maturity in only three days, is under a lot of competitive pressure to reproduce quickly, and that different binding sites on different Pairing Centers makes for faster chromosome pairing and thus faster reproduction -- unlike organisms ...

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