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もちろん訳は、人間の本性を考える（上）（中）が古本屋にあったので、これも用意して参照！
第3章 Chapter 3
揺らぐ公式理論 The Last Wall to Fall
＜遺伝子は人間の本性にどう影響するか＞
People sometimes fear that if the genes affect the mind at all they must determine it in every detail.
That is wrong,for two reasons.
The first is that most effects of genes are probabilistic.
If one identical twin has a trait, there is usually no more than an even chance that the other will have it, despite their having a complete genome in common.
Behavioral geneticists estimate that only about half of the variation in most psychological traits within a given environment correlates with the genes.
In the chapter on children, we will explore what this means and where the other half of the variation comes from.
The second reason that genens aren't everything is that their effects can vary depending on the environment.
A simple example may be found in any genetics textbook.
While different strains of corn grown in a single field will vary in height because of their genes, a single strain of corn grown in different fields - one arid, the other irrigated - will vary in height because of the environment.
A human example comes from Woody Allen. Though his fame, fortune, and ability to attract beautiful women may depend on having genes that enhance a sence of humor, in Stardust Memories he explains to an envious childhood friend that there is a crucial environmental factor as well:"We live in a society that puts a big value on jokes.....If I had been an Apache Indian, those guys didn't need comedians, so I'd be out of work."
以上を要約せよ・・・
もちろん訳は、人間の本性を考える（上）（中）が古本屋にあったので、これも用意して参照！
第3章 Chapter 3
揺らぐ公式理論 The Last Wall to Fall
＜遺伝子は人間の本性にどう影響するか＞
People sometimes fear that if the genes affect the mind at all they must determine it in every detail.
That is wrong,for two reasons.
The first is that most effects of genes are probabilistic.
If one identical twin has a trait, there is usually no more than an even chance that the other will have it, despite their having a complete genome in common.
Behavioral geneticists estimate that only about half of the variation in most psychological traits within a given environment correlates with the genes.
In the chapter on children, we will explore what this means and where the other half of the variation comes from.
The second reason that genens aren't everything is that their effects can vary depending on the environment.
A simple example may be found in any genetics textbook.
While different strains of corn grown in a single field will vary in height because of their genes, a single strain of corn grown in different fields - one arid, the other irrigated - will vary in height because of the environment.
A human example comes from Woody Allen. Though his fame, fortune, and ability to attract beautiful women may depend on having genes that enhance a sence of humor, in Stardust Memories he explains to an envious childhood friend that there is a crucial environmental factor as well:"We live in a society that puts a big value on jokes.....If I had been an Apache Indian, those guys didn't need comedians, so I'd be out of work."
以上を要約せよ・・・
