Examlex
Why does the baby boomer generation tend to choose a common-law union over a formal marriage?
Fraternal Twins
Twins that develop from two different eggs fertilized by two different sperm, making them genetically distinct, similar to regular siblings.
Identical Twins
Twins who develop from a single fertilized egg that splits and forms two embryos, sharing 100% of their DNA.
Heritability
A measure of how much of the variation in a trait among individuals within a population is due to genetic differences.
Heritability Estimates
Statistical measures that indicate how much of the variation in a trait within a population can be attributed to genetic differences.
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