6 doctors weighed in:

Is it true that Down syndrome is dominant or recessive?

6 doctors weighed in
Dr. William Singer
Pediatrics - Neurology
3 doctors agree

In brief: Neither

Down syndrome is neither dominant nor recessive.
Down syndrome occurs due to there being 3 number 21.

In brief: Neither

Down syndrome is neither dominant nor recessive.
Down syndrome occurs due to there being 3 number 21.
Dr. William Singer
Dr. William Singer
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Dr. Robert Kwok
Pediatrics
2 doctors agree

In brief: No

Down syndrome (trisomy 21) is neither dominant nor recessive.
Trisomy 21 means there are 3 copies of chromosome 21 (normal is 2 copies or 1 pair). The terms "dominant" and "recessive" are used to describe particular genes and the traits they produce. A chromosome is a much bigger structure, containing more than thousands of genes. Normal humans have 23 pairs of chromosomes (46 total chromosomes).

In brief: No

Down syndrome (trisomy 21) is neither dominant nor recessive.
Trisomy 21 means there are 3 copies of chromosome 21 (normal is 2 copies or 1 pair). The terms "dominant" and "recessive" are used to describe particular genes and the traits they produce. A chromosome is a much bigger structure, containing more than thousands of genes. Normal humans have 23 pairs of chromosomes (46 total chromosomes).
Dr. Robert Kwok
Dr. Robert Kwok
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