Sentences with phrase «genetic differences»

To separate the influence of random drift from active adaptation, the researchers looked for genetic differences between urban and rural mice that were too extreme to be explained by drift alone.

Genetic flow is the term for the potential of genetic differences in a single species to be passed around within a species.

But in the mid 1990s, several evolutionary biologists began to assess kinship by analyzing degrees of genetic difference among species.

Other chapters apply this to the genetics of immune systems, the evolutionary benefits of sexual reproduction, genetic differences among human populations, the origin of life and more.

Scientists have long looked for genetic differences in these fortunate individuals — and they've already found a few.

Humans with genetic differences related to dopamine transport, she adds, have been shown to do worse on the type of mental fitness tests given to the astronauts and rats alike.

But despite artificial influences the study found genetic differences between humans are what continue to fuel evolution.

But the subjects are few, he notes, and such studies are always complicated by genetic differences between the subjects.

Future studies will need to clarify the exact role of these genes in intelligence in order to obtain a more complete picture of how genetic differences lead to differences in intelligence.

Such genetic differences may explain why some people are more susceptible to mercury poisoning than others.

Nonetheless, many studies in mammals have shown genetic differences in responses to caffeine.

But the comparison has also revealed genetic differences too.

When populations expand, they have more genetic differences.

Key genetic differences between humans and mice make research rodents less than perfect patients.

While scientists have found many genetic differences in different people with ASD, these often show little overlap and don't appear to be related.

However, the real focus of the paper is the description of their finding of a few genetic differences between brown bears and polar bears that they identified.

They analyzed genetic differences between modern species and the limits placed on the age of their shared ancestors by available fossil evidence.

Additional work will be needed to distinguish whether genetic differences between locations are the result of adaptation or genetic drift within the species.

The extent of accumulated genetic difference enabled the researchers to speculate about when the different populations separated.

This approach — known as a genome - wide association study — is widely used to identify genetic differences.

The pace of aging also depends on individual genetic differences within a breed and the quality of care pets receive from their human guardians.

Some of the largest genetic differences are located in genes that have the potential of influencing susceptibility to infectious diseases.

However, genetic differences do not guarantee evolutionary success.

The short answer is that there is no biological basis for «race» as we know it, but among populations there can be small but measurable genetic differences.

That in turn would allow genetic differences to accumulate between groups with different song preferences and eventually lead to the creation of new species.

The team was able to use the tool to pinpoint genetic differences between these two closely related fish species that affect schooling.

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

Further work found that the previously reported longevity was associated with background genetic differences.

These mutations lead to genetic differences even between closely related species.

Although genetic differences are not major, they nevertheless may influence how well the insects adapt to their habitat.

These regions, however, lie several hundred kilometers apart from each other and the generally high genetic difference between the populations does not suggest high rates of exchange.

Another thing the team didn't consider was genetic differences among individuals: Some monkeys are naturally more susceptible to adversity whereas others are more resilient, he says.

Next, we looked at genetic differences in our ability to read each other's moods.

They account for about half of all differences in intelligence among people, so half is not caused by genetic differences, which provides strong support for the importance of environmental factors.

A better understanding of genetic differences may help scientists plan more successful protection strategies.

Every person is born with genetic differences, called variation.

Had they stayed separated longer, they would have naturally accumulated too many genetic differences to mate successfully.

Rather, it assesses whether genetic differences can be excluded as an explanation for each behavior; it finds that they can not more than half the time.

How do genetic differences between individuals combine to determine responses to environment and sensitivity to disease?

Each strain is designed to have slight genetic differences from the other rats, but extremely similar genetics within the strain itself [source: PetMD].

Population structure in the past could result in significant genetic differences between modern and ancient whales.

Based on their findings, Bueno and colleagues see genotyping their patients in the clinic — a process of looking for genetic differences at precise locations in the genome - as an important next step.

Thus, the scientists were able to see how very slight genetic differences affected brain activity, which will allow them identify the roles of sub-sets of Williams genes in brain development and in adult facial recognition abilities.

That and other genetic differences suggest we didn't interbreed extensively, says Pääbo, but it doesn't mean Neanderthals couldn't have contributed a few genes here or there.

But it has been difficult to determine just how much the invaders — Anglo - Saxons from Europe's North Sea coast — contributed because of the small genetic differences among European groups.

Careful genetic analysis not only confirmed long - standing suspicion that Y. pestis was the microbe responsible for the plague, but also found slight genetic differences among bacteria from various remains at the site — suggesting that even as it killed millions, the bacterial strain itself was dying off.

Because genetic differences arise at a fairly constant rate, this question can be answered by constructing family trees using similar sequences from different varieties of teosinte and contemporary maize.