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Genetic Diseases and Disorders

Genetic Diseases: transmitted from parents to children What they are - Definition Also known as hereditary diseases, genetic diseases are those transmitted from parents to children, ie from generation to generation. Defective genes pass from parents to children and can lead to certain diseases or disorders.
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43.5B: Cleavage, the Blastula Stage, and Gastrulation - Biology

A zygote undergoes rapid cell divisions (cleavage) to form a spherical ball of cells: the blastula; this will further develop into a blastocyst.Learning ObjectivesDescribe the events that occur from the formation of a zygote to gastrulationKey PointsA single-celled zygote will undergo multiple rounds of cleavage, or cell division, in order to produced a ball of cells, called a blastula, with a fluid-filled cavity in its center, called a blastocoel.
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Proving time travel

Consider this answer to an interesting question. It's not possible to prove completely that someone is the descendant of someone else, there's always a nonzero probability that the results are a
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