Question

If human female gestation was reduced to a week and human males completely took over the job of feeding and caring for the children from the day they were born, what behavioral and morphological changes should eventually evolve according the principles of sexual selection? (Don't just give memorized generalizations, use your imagination and be specific)

Answer 1

If gestation period is reduced to a week and if it ensures that the child is completely developed in that week then there will be few changes in human body.

The females will not have well developed mammary glands but males will have well developed mammary glands as now they will be nursing the babies.

Now babies will be more attached to their father rather being attached to their mothers.

Mother and child relationship which is known well for their attachment,love and care will almost disappear. The child bow will be more attached to their father. Fathers will change their nature and behavior from being strict to being caring and loving.

Father and child relationship would improve.

The size of uterus might decrease as they don't have to carry the baby for a longer duration of time.

No changes in the menstrual cycle.