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To determine if an animal will be horned, polled (smooth-polled), or scurred (scurred-polled) is gene dependent. The editor above in the Definition and title section was really close but got side-tracked by introducing sheep into the picture. I am more experienced concerning horned versus polled cattle but some research will likely conclude the ...
Polled strains have been developed of many cattle breeds which were originally horned. This has usually been done by crossing with naturally polled breeds, most commonly Angus and Galloway cattle. For example, polled Jersey cattle originated in Ohio sometime prior to 1895. Two strains were developed, the first to appear being founded by crosses ...
The words homozygous, heterozygous, and hemizygous are used to describe the genotype of a diploid organism at a single locus on the DNA. Homozygous describes a genotype consisting of two identical alleles at a given locus, heterozygous describes a genotype consisting of two different alleles at a locus, hemizygous describes a genotype consisting of only a single copy of a particular gene in an ...
Also called functionalism. The Darwinian view that many or most physiological and behavioral traits of organisms are adaptations that have evolved for specific functions or for specific reasons (as opposed to being byproducts of the evolution of other traits, consequences of biological constraints, or the result of random variation). adaptive radiation The simultaneous or near-simultaneous ...
In general, the same words are used in different parts of the world, but with minor differences in the definitions. The terminology described here contrasts the differences in definition between the United Kingdom and other British-influenced parts of the world such as Canada, Australia, New Zealand, Ireland and the United States. [1]
A gunman opened fire at an adult education center in the Swedish city of Örebro on Tuesday, killing at least 10 people in what the country’s prime minister called the “worst mass shooting in ...
Iconic skylines are one way to immediately identify some cities. Some looming skyscrapers haven't stood the test of time, becoming abandoned or remaining incomplete.. Cities must figure out what ...
The parent Suffolk breed was also polled; Norfolk cattle had horns, but the gene for horns was bred out in the Red Poll breed. The original name for the breed, adopted in 1863, was Norfolk and Suffolk Red Polled cattle, and the first standard description was agreed upon in 1873, with the first herd book compiled in 1874.