Bonnie and Brendan are both frequent sunbathers. Brendan, Bonnie's brother, doesn't have any freckles. It is reasonable to believe that Bonnie and Brendan have distinct alleles for the freckle gene.
What significance does lifespan development have?
- Understanding the expected progression of human lifespan development is crucial because it provides the framework for understanding the causes of our difficulties in daily life. For example, failing to have a functional understanding of how to acquire dates as a teenager may result in us developing social anxiety issues as adults.
- The study of individual development, or ontogenesis, from conception to death is a topic covered by life-span developmental theory. This theory's central tenet is that development continues even after a person reaches maturity (Baltes, Lindenberger, & Staudinger, 1998, p. 1029) 1
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