Biology

in cattle a dominant gene (N) results in a deep notch in each ear. a recessive gene (n) results in an "udder" abnormiality when in the homozygous condition. a farmer desires to rid his herd of these characteristics. which of these two alleles would be easiest to eliminate from his herd. explain how the farmer would eliminate this allele.

I don't understand why the same letter is being used for two different characteristics.

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  1. The only thing I can think of is that nn results in the udder abnormality and Nn gives an ear notch. This doesn't sound too logical, so it might be a typo.

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