In genetics, what is a trisomy?

Answer 1

In genetics, a trisomy is having 3 chromosomes instead of the usual pair of chromosomes. For example, trisomy 21 is down syndrome, where the 21st chromosomes are not pairs, but triples.

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Answer 2

Eli Ayoub

Trisomy is a genetic disorder characterized by the presence of an additional chromosome in a cell, resulting in three copies of a particular chromosome instead of the usual two. This condition can lead to developmental abnormalities and health issues, depending on which chromosome is affected. One well-known example is Down syndrome, which is caused by trisomy of chromosome 21.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.