What is the genetic alteration that causes Down Syndrome? I - Down Syndrome is caused by a genetic alteration resulting from the trisomy of chromo...
What is the genetic alteration that causes Down Syndrome?
I - Down Syndrome is caused by a genetic alteration resulting from the trisomy of chromosome 21.
II - The alteration occurs in 95% of cases due to an error in the pairing of chromosomes during cell division.
III - The presence of an extra chromosome 21 is always inherited from the mother.
IV - Translocation is the most common type of chromosomal anomaly in Down Syndrome.
a) I and II are correct.
b) II and III are correct.
c) I and IV are correct.
d) II and IV are correct.
I - Down Syndrome is caused by a genetic alteration resulting from the trisomy of chromosome 21.
II - The alteration occurs in 95% of cases due to an error in the pairing of chromosomes during cell division.
III - The presence of an extra chromosome 21 is always inherited from the mother.
IV - Translocation is the most common type of chromosomal anomaly in Down Syndrome.
a) I and II are correct.
b) II and III are correct.
c) I and IV are correct.
d) II and IV are correct.
💡 1 Resposta
Ed 
A alternativa correta é a letra "a) I e II estão corretas". A Síndrome de Down é causada por uma alteração genética resultante da trissomia do cromossomo 21, que ocorre em cerca de 95% dos casos devido a um erro no pareamento dos cromossomos durante a divisão celular.
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