two types of experiments control home environment and study heredity or vice

Two types of experiments control home environment and

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two types of experiments: control home environment and study heredity or vice versa 1. Identical vs Fraternal Twins Identical Twins: develop from a single (monozygotic) fertilized egg that splits into two, are genetically identical, but don’t always have same number of copies of gene Fraternal Twins develop from two separate (dizygotic) eggs, share fetal environment but no genetically similar than ordinary brothers and sisters are genetic clones also behaviorally similar? separated twins still show similarities (Jim Lewis and Jim Springer) 2) Biological vs Adoptive RelativesAre adopted children more like their adoptive families/parents or biological parents?
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