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Scientists studying the habits of two related species of harvester ants have discovered that during sex, the queens will essentially steal sperm from unwitting male ants of the other species. The findings, published in the Proceedings of the Royal Society B, shed light on the evolutionary arms race between two species that can play out in a battle of the sexes. Researchers from the University of Vermont studied two species of Pogonomyrmex harvester ants that live in the desert around the border between Arizona and New Mexico.

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Sex-links [1] are crossbred chickens whose color at hatching is differentiated by sex, thus making chick sexing an easier process. Sex-links come in several varieties. As hybrids of laying or dual-purpose breeds infused with extra vigor via heterosissex-links can be extremely good egg-layers which often produce eggs a year or more depending on the quality of care and feed.

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A farmer or hatchery manager who wants to manage the genetic aspects of his population must know how inbreeding can be used to improve productivity and profits. Inbreeding is one of the three major traditional breeding programmes that breeders have used for centuries to improve animals and plants. While it is not as important as selection or crossbreeding, inbreeding is used to produce genetically improved livestock, plants, and laboratory animals.

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By Don Schrider — At Backyard Poultry we get questions all the time asking for help identifying the breed of various chickens. Such poultry can be very productive and useful for the backyard fancier but cannot be considered a breed. In other words, a breed breeds true. The advantage of pure breeds is that each generation of offspring can be counted on to look and perform in the same way as the previous generation.

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Animal breedingcontrolled propagation of domestic animals in order to improve desirable qualities. Humanity has been modifying domesticated animals to better suit human needs for centuries. Selective breeding involves using knowledge from several branches of science.

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Robert Krulwich. We have dreamed about it for so long. We've told stories, made movies, imagined what it would be like when we humans have our first "close encounter" with an intelligent alien, a creature about our size, who can gaze back, talk even if we can't understand what's being said who can scare us, thrill us, make us feel its mind.

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Fur seals have been caught engaging in an extreme form of sexual behaviour. Specifically, trying to have sex with penguins. This media cannot be played on your device.

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H ooking up with members of other species is generally frowned upon. What sets these monkeys apart are the extraordinarily distinct features associated with different species: some of them have bushy beards, some have brightly colored tufts of hair, some have huge cheeks. If you, for example, tried to have a baby with a horse, doing so would not make a centaur.

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One question seemed to hang in the air more than any other when scientists first turned the powerful techniques of modern genetics on the fragile and damaged remains of ancient humans: did we or didn't we? Have sex with them, that is. The answer came after years of painstaking work, when material extracted from the leg of a Neanderthal and the fingerbone of a Denisovanan apparent sister species, yielded readable DNA.

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