Miguel jogs about 5 miles a day. at roughly the three-mile point, miguel usually experiences a rush of positive feelings due to levels of

increased; endorphins

Explanation:

You have probably heard that exercising, such as running or cycling, in addition to improving physical quality, provides a sense of well-being. The answer to this feeling is quite simple: it is endorphin.

Endorphin is a neurohormone produced by our own body in the pituitary gland and brings several benefits to the body such as pain relief, increased mood, improved mood, and control of contractions of the intestinal wall. They also control the release of other hormones and serve as a "natural painkiller" stress inhibitor. The production of this hormone is stimulated when we practice physical exercises. This explains why Migal feels good after running 8 km.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

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