Exchange of breeding individuals between two populations tends to homogenize their gene pools.

Islands are known to differ in the food supply available to ground finches, mainly seeds.

To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically inherited in a fixed manner but are determined by learning early in life.

Evidence of epistasis from hybridization studies is more scarce.

Plumage features constitute a major component of courtship signals.

The theory of founder effects does not explain how novel features like plumage traits arise.

The process of speciation is completed with the cessation of genetic exchange.

Almost nothing is known from hybridization studies about the inheritance of courtship behavior of females, or of their responsiveness to particular male signals.

Males transmit signals in courtship through behavioral displays.

Thus mating of females was strictly along the lines of paternal song.

Species can be recognized by their morphological characteristics and songs.

Thus the genetic basis to the origin of bird species is to be sought in the inheritance of adult traits that are subject to natural and sexual selection.

We observe closely related species in sympatry and infer how they evolved from a common ancestor.

Genes that underlie the capacity to receive, use and transmit information are the evolving properties.

The divergence of songs in the new population away from those in the progenitor population would only be prevented if these processes were balanced by repeated immigration and subsequent breeding: song flow.

Closely related species of birds are also chromosomally similar.

Exchange of breeding individuals between two populations tends to homogenize their gene pools.

The independent role of morphology in mate choice is revealed by the rare instances where the usual association between song and morphology is disrupted.

Those are serious questions of war and peace, of freedom or tyranny, whether or not there is ever going to be a hope of us instilling some democratic systems in a part of the world that frankly is breeding hate and destruction directed right at us.

Americans sometimes say to me that they have no class system themselves. All human beings have class systems. It can be based on a different thing in a different country, but the thing about breeding is, you can't buy it. You can't buy class.

Simplicity is a great element of good breeding.

Two years work wasted, I have been breeding those flies for all that time and I've got nothing out of it.

It's a naive domestic Burgundy without any breeding, but I think you'll be amused by its presumption.

Women of quality are so civil, you can hardly distinguish love from good breeding.

Civilization never stands still; if in one country it is falling back, in another it is changing, evolving, becoming more complicated, bringing fresh experience to body and mind, breeding new desires, and exploiting Nature's cupboard for their satisfaction.

First, they were bred when I was not capable to observe or before I was born; likewise the breeding of men is of a different manner from that of women.

Masses are always breeding grounds of psychic epidemics.

We were in opposition to the decision to go to war. But after the war happened, it was clear that you could not sit and look-there would be a breeding ground for terrorism or a new collapsed or failed state named Iraq!

Stillness of person and steadiness of features are signal marks of good breeding.

Characteristics of a popular politician: a horrible voice, bad breeding, and a vulgar manner.

Candor is a proof of both a just frame of mind, and of a good tone of breeding. It is a quality that belongs equally to the honest man and to the gentleman.

Gay sex is a veritable breeding ground for disease.

You write with ease to show your breeding, but easy writing's curst hard reading.

Research on child abuse suggests that religious beliefs can foster, encourage, and justify the abuse of children. When contempt for sex underlies teachings, this creates a breeding ground for abuse.

The secret of improved plant breeding, apart from scientific knowledge, is love.

Poverty does not make people terrorists, but terrorists can exploit the frustration it creates and use it as a breeding-ground for violent ideas.

Moreover, the concern of some that moving DNA among species would breach customary breeding barriers and have profound effects on natural evolutionary processes has substantially disappeared as the science revealed that such exchanges occur in nature.

If ever a man and his wife, or a man and his mistress, who pass nights as well as days together, absolutely lay aside all good breeding, their intimacy will soon degenerate into a coarse familiarity, infallibly productive of contempt or disgust.

Sides are being divided now. It's very obvious. So if you're on the other side of the fence, you're suddenly anti-American. It's breeding fear of being on the wrong side.

People of small caliber are always carping. They are bent on showing their own superiority, their knowledge or prowess or good breeding.

The test of a man or woman's breeding is how they behave in a quarrel.

Democracies are poor breeding grounds for terrorism and war.

The chief ingredients in the composition of those qualities that gain esteem and praise, are good nature, truth, good sense, and good breeding.

What's different here is that we have now technologies that allow these life science companies to bypass classical breeding. That's what makes it both powerful and exciting.

Not that I am ashamed of my mind or body, my birth or breeding, my actions or fortunes, for my bashfulness is in my nature, not for any crime.

Good breeding consists in concealing how much we think of ourselves and how little we think of the other person.

Slums may well be breeding grounds of crime, but middle class suburbs are incubators of apathy and delirium.

Fashion exists for women with no taste, etiquette for people with no breeding.

Good breeding differs, if at all, from high breeding only as it gracefully remembers the rights of others, rather than gracefully insists on its own rights.