Sentences with phrase «to produce viable offspring»

They can not produce viable offspring with other insects in the wild, not even with other species of mosquito.

Other workers have failed to produce viable offspring when they attempted equivalent experiments.

Unlike mammals, mated corn varieties can have fairly vast genetic differences and still produce viable offspring.

More provocatively, insect studies have shown that having non-matching microbiomes can prevent individuals of the same species from producing viable offspring, thus influencing the evolution of their host insect species.

In a separate study conducted by Zhang Zhaobin of the College of Urban and Environmental Sciences at Peking University, exposure to TPT reduced the ability of the Japanese Medaka fish (Oryzias latipes) to produce viable offspring by as much as 75 % in a controlled facility.

• We erroneously attributed to Thomas Frost the statement that sheep and goats can not interbreed to produce viable offspring unless...

Although they can produce viable offspring in some lizards and fish, in mammals they typically result in embryos that survive for only a few days or weeks.

«If one defines that two species separate as when they can not produce viable offspring, then perhaps brown bears and polar bears aren't yet separate species,» Miller admits.

A working definition of a species is that members of the same species can produce viable offspring when they mate — something members of different species can not do unless the species are very closely related.

The approach, called «synthetic incompatibility,» effectively makes engineered organisms a separate species unable to produce viable offspring with their wild or domesticated relatives.

Then, however, genetic analysis reveals that members of these two species interbred and produced viable offspring that populated Europe and spread eastward as far as China and Papua New Guinea.

After isolation, if members of the split populations encounter one another and can not produce viable offspring that can themselves later successfully interbreed and produce viable offspring (hybrids such as mules are infertile), then these two populations constitute two different species.

The bald eagle was nearly extinct in the continental U.S. by the late 20th century, but the population has since stabilized, primarily due to habitat protection and a ban on DDT, an insecticide that weakened the birds» eggs so much that the eagles could not produce viable offspring.

Wild snakes have been seen gestating parthenogenetic young, but it's unknown if they would ever have produced viable offspring.

But to really prove that they are oocytes, Surani says, the team needs to show that the cells can be fertilized and produce viable offspring.

Earlier research has shown that both characteristics make a male less likely to produce viable offspring.

Crossovers are necessary to produce viable offspring, but crossing over also has risks.

It has to do with finding the best genetically compatible partner to produce viable offspring.

These adult fleas are unable to produce viable offspring.

It was the major division used by Carl Linnaeus (1707 — 1778) in his classification system and identifies plants or animals that can produce viable offspring.

For example, we know a horse and a donkey can produce a mule but the mule can not produce viable offspring.