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Why is Down syndrome a recessive trait?
Down syndrome is not necessarily a recessive trait, per se, since you can have differing degrees of Downs. Additionally, recessive trait would imply inheritance from parents caused the disorder, and...
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Is Down syndrome a recessive allele?
No. down Syndrome is caused by a triplication (instead of a duplication) of the 21st Chromosome. It is not caused by an allele and is not inheritable in most cases.
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Is Down syndrome caused by a recessive gene?
Down syndrome is caused by an additional copy of chromosome 21. There is not a specific "gene" that causes it, the additional copy of the chromosome leads to other changes and processes that result...
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What makes Down syndrome a recessive trait?
The above answer is totally false. Down syndrome is caused by a third copy on chromosome 21 and is present at conception or shortly after. It is mostly a random (and relatively common) occurrence,...
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Iis down syndom caused by a dominant or recessive allele?
Neither. Down's Syndrome is cause by there being an extra chromosome included in the egg that gave rise to the individual.