White Tiger ,, - a photo on Flickriver

White Tiger ,,

            
A white tiger is a tiger with a recessive gene that creates the pale coloration. Another genetic characteristic makes the stripes of the tiger very pale; white tigers of this type are called snow-white or "pure white". White tigers are not albinos  and do not constitute a separate subspecies  of their own and can breed with orange ones, although (approx.) half of the resulting offspring will be heterozygous  for the recessive white gene, and their fur will be orange. The only exception would be if the orange parent was itself already a heterozygous tiger, which would give each cub a 50% chance of being either double-recessive white or heterozygous orange. If two heterozygous tigers, or heterozygotes, breed on average 25% of their offspring will be white, 50% will be heterozygous orange (white gene carriers) and 25% will be homozygous orange, with no white genes. In the 1970s a pair of heterozygous orange tigers named Sashi and Ravi produced 13 cubs in Alipore Zoo, of which 3 were white.[4]  If two white tigers breed, 100% of their cubs will be homozygous white tigers. A tiger which is homozygous for the white gene may also be heterozygous or homozygous for many different genes. The question of whether a tiger is heterozygous (a heterozygote) or homozygous (a homozygote) depends on the context of which gene is being discussed. Inbreeding  promotes homozygosity and has been used as a strategy to produce white tigers.
   

Taken on: March 27, 2010

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guanzhou

Aiman

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Groups appears in: • White Tigers

Camera: Sony DSLR-A200, f/5.6, 1/500 sec, 300mm (=450mm), ISO 200 (more info) (hide info)

Camera:	Sony DSLR-A200
Aperture:	f/5.6
Exposure Time:	0.002 sec (1/500)
Focal Length:	300mm (35mm equivalent: 450mm)
ISO:	200
Exposure Bias:	0 EV
Flash:	Auto, Did not fire
Exposure Program:	Program AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	Adobe Photoshop CS4 Windows
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