Downs syndrome is caused by a genetic mutation called trisomy. Trisomy is when an extra chromosome is present on one set of chromosomes, so instead of the 46 chromosomes of a normal human there are 47. Trisomy can often result in miscarriage as the body cannot cope well with extra chromosomes. Downs syndrome is when there is an extra chromosome 21. Other genetic defects which are caused by trisomy are Edwards syndrome and Patau syndrome.
Down syndrome is caused by the presence of an extra 21st chromosome. Instead of the typical 2 copies, a person with DS will have 3 copies (known as a trisomy).
Down syndrome is not a mutation, but is usually an inherited condition due to the extra genetic material in one of the parents' egg or sperm, whether by Nondisjunction or by Translocation.
Mosaic is a rare form of DS wherein after conception with typical genetic material, an error in cell replication - mitosis- creates some cells with Trisomy 21 and some cells remain typical.
uh... no not at all its a sort of mutation with the gene. the chromosones split up and the red ang green segmet of chromatids switch 1 chromatid
No.
Down syndrome is caused when a person inherits three copies of chromosome 21 instead of two.
NO, it is caused by the Trisomy of the human chromosome 21
An extra chromosome in 21. You're only supposed to have 2 but the disorder causes it to have 3.
Trisomy 21
An extra 21st chromosome.
My own clumsiness caused my fall down the stairs.
God's wrath caused him to send down lightning bolts and kill your mother.
Down's Syndrome Kleinfelter's Syndrome
The water evaporates into the air. This is called evaporation. Evaporation is caused by the heat of the sun. If it is cloudy or cold, the water is not likely to evaporate.
You are anxious. Being anxious can go either way. You can head to down that path of being nervous or you can head down the path of being excited. Anxiousness is usually a mix of both. Its caused when the "unknown" factor is riddling your mind.
Deformaties are always caused by genetic errors, but what causes these errors depends, like pollution or desease.
Your weight, caused by the effect of gravity.
Down syndrome is not caused by a bacterial infection therefore the answer to your question is no. Down syndrome is caused by an extra chromosome in the cell nucleus.
Down's Syndrome is caused mainly by a mutation in the gene. It is a genetic disorder, which means it was passed on from parents to offspring.
Down syndrome is not caused by premature birth. Down syndrome is present in the embryo from the time of conception. Down syndrome, in contrast, may lead to premature birth.
NO, it is caused by the Trisomy of the human chromosome 21
Down syndrome is caused by an additional chromosome while PKU is due to a mutation or defect in a gene.
No, down syndrome is caused by a genetic defect where there is an extra chromosome in most,if not all, of the cells of a body. it is not caused by a drug.
caused by the genetic traits in your famiy that are passed down, but mostlyaffects boys.
Down's syndrome is a disorder caused by defective genes. It is most commonly caused by parents who are elderly at the time of birth.
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