Examlex
Sperm are produced by the structures inside the testes called the ________.
Double Helix
The structure of DNA, characterized by two strands that wind around each other like a twisted ladder.
Huntington Disease
A hereditary disorder caused by a genetic mutation, leading to the progressive degeneration of nerve cells in the brain.
Recessive Gene
A genetic trait that is expressed in an organism's phenotype only if two copies of the gene are present, but is masked if a dominant gene is present.
Dominant Gene
A gene that expresses its phenotypic trait even when only one copy is present in the genotype.
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