Examlex
A medical expense is generally deductible only in the year in which the expense is actually paid.
Adoption Studies
Research studies that compare biological and adoptive family members to understand the influence of genetic versus environmental factors on traits or disorders.
Concordance Rates
The probability that two individuals with shared genetics, such as twins, will both exhibit a particular trait or disorder, used in genetics and psychology to study inheritance patterns.
Monozygotic Twins
Identical twins that result from the fertilization of a single egg that then splits into two, sharing 100% of their genetic material.
Dizygotic Twins
Also known as fraternal twins, these are siblings born at the same time but developed from two separate eggs fertilized by two different sperm.
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