Trisomy-21 results from a mutation to the chromosomes in

a) body cells
b) somatic cells
c) gametes
d) skin cells

The right answer is C) gametes.

In its most common form, trisomy 21 is characterized by the presence of three chromosomes 21. In general, the origin of this trisomy is a fertilization between a gamete possessing a chromosome 21 and a gamete possessing two chromosomes 21. In the very In the vast majority of cases, the anomaly is borne by the oocyte. Indeed, the aging of the oocytes is at the origin of meiotic anomalies favoring the occurrence of trisomy. This pathophysiological aspect explains that the risk of T21 is directly related to maternal age.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation:

b.have there own function.