mendelian ratios

Posted by KK on January 27, 2002 at 12:37:09:

In Reply to: albinism posted by snake ventura on November 11, 2001 at 23:55:19:

In any particular litter, the percentages may not follow the mendelian prediction, because the mendelian ratio is a ratio of CHANCE.

However, if one were to repeatedly breed the same two animals, and keep track, one will find that the bias against the mendelian prediction in a particular litter, will be corrected in another litter.

Thus, in breeding albino mice (have alot of experience there) to heterozygous mice, one litter may have a larger number of albino offspring than predicted... but in TEN litters (the average reproductive life of a mouse) from the same parents, the ratio will be close to 50%.

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: In any particular litter, the percentages may not follow the mendelian prediction, because the mendelian ratio is a ratio of CHANCE. : However, if one were to repeatedly breed the same two animals, and keep track, one will find that the bias against the mendelian prediction in a particular litter, will be corrected in another litter. : Thus, in breeding albino mice (have alot of experience there) to heterozygous mice, one litter may have a larger number of albino offspring than predicted... but in TEN litters (the average reproductive life of a mouse) from the same parents, the ratio will be close to 50%.

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