Science
Why Can Children Resemble One Parent, a Grandparent, or Neither Parent?
Why children can resemble a parent, a grandparent, or neither: equal DNA inheritance, dominant and recessive alleles, and polygenic traits explained.
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Which Traits Are More Likely to Come From Your Mother or Father?
Learn when traits follow usual two-parent inheritance and when X, Y, mitochondrial DNA, imprinting, or new mutations make parent of origin matter.
Science
How Are Genetic Conditions Passed Through Families?
A plain-language guide to dominant, recessive, X-linked, mitochondrial, and chromosomal inheritance through families.