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Knockout mice are made in research laboratories or can be obtained from specialized companies such as: Taconic www.taconic.com
In simple words, you can not conclude without molecular data. You may sometimes see a visible phenotype such as change in color of eyes, skin or growth or any such things for some genotype. but this doesn't validate that the gene knock out actually happened in both allele.
Gene knockout organisms are animals, usually mice and rats, who have been genetically engineered so that one of their genes is removed or knocked out. The ways in which their behaviour or appearance deviates from normal shows what the function of that gene is. For example, if the animals cannot stop eating and eat themselves to death, then it is clear that the genes are essential to the animal's ability to feel full and so stop eating. Knockout mice can also be used to test the effect of drugs and medication: if the drug has an effect on normal mice but not on the knockout mice then clearly the drug works through the mechanism which is controlled by the missing gene.
ones white the others black The question can be improved by asking about the similarities between white mice and brown mice. All mice can become dirty. And, the answer can be much improved by stating what the mice have in common since that is what is meant by similarities. By the way, where are these black mice? I have never seen one. Are there photos of them?
Knock out mice are produced by impairing or deleting a particular gene expression. Thus the gene function (which was deleted) can be tracked by studying this knock out and the control mice. Lets say a gene is suspected to trigger immune response against a pathogen, one can study this by infecting the wild type(normal) and knock out(specific gene deleted) mice and study the role of the gene.
only if its daylight,some mice could be scared of their own reflection
Yes, it might be. Preliminary studies suggest that the venom could be useful in some rare cases. In one study in mice of a specific malignant cancer, the venom reduced tumor growth and improved liver function.
What I think, YES, because you should not have to live in a house with mice.
well... Mice could have brown,white,peach,and even black or a combination! :3
No, but they could attack if provoked.
Yes, mice can be pets.
No, mice ARE scavengers. They're one of the smallest animals in the world, I DOUBT a mouse could eat another scavenger.