Answers

2016-07-12T21:35:07+08:00
In cattle, for instance, lactation is expressed in females but never in males. Both male and female cattle however possess a gene pair for lactation. The gene for lactation is dominant over the non-lactating gene. These genesare carried by both males and females, but it is only expressed in females. Inmale cattle, it does not matter if they possess one or two genes for lactation. They never produce milk.
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