Human beings are most capable of survival at an internal temperature of about 37 degrees celsius. however , the temperature outside is rarely exactly 37 degrees celsius

Humans have a system of homeostasis inside their body which helps maintain temperature accordingly.

Explanation:

Human body is blessed with full-fledged thermoregulatory system inside it to sustain the temperature change in the environment.

Homeostasis can be defined as a tendency of the human body to maintain constant temperature inside in comparision to the environment temperature.

Blood helps human beings maintain homeostasis by vasoconstriction or vasodilation of the blood vessels.

The heat is lost in high temperatures by sweating resulting in maintenance of body temperature.

The waste material released is ejected to maintain temperature.

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

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