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Neurotransmitters move by active transport across the synaptic cleft.
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Y Chromosome
A sex chromosome found in mammals, including humans, typically associated with male characteristics and inherited from father to son.
Dosage Compensation
Any mechanism of equalizing gene expression between males and females.
Barr Body
Inactivated (condensed) X chromosome in a cell of a female mammal.
Double-Stranded RNA
A molecular structure of RNA where two complementary strands form a double-helix, often involved in gene expression and regulation.
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