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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(Date:4/15/2014)... Biologists at UC San Diego have succeeded in ... hormone responsible for growth and resistance to drought. ... studies to determine how the hormone helps plants ... by the continuing increase in the atmosphere,s carbon ... achievement appears in the April 15 issue of ...
(Date:4/15/2014)... Looking at the question of how social behavior has ... universities in Mainz and Basel have gained new insights ... simply compete for food. Rather the siblings share what ... absent," explained Dr. Jol Meunier of the Evolutionary Biology ... University of Mainz (JGU). The team of biologists from ...
(Date:4/15/2014)... (April 15, 2014) The American Association of Anatomists ... All awards will be presented during the Closing ... Hotel on Tuesday, April 29th at 7:30 p.m. during ... , The 2014 award winners are: , ... PhD, of the Icahn School of Medicine at Mount ...
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