Question

Which of the following human karyotypes exhibit EUPLOIDY?

1) 46,XX
2) 47,XY,+21
3) 47,XY,+18
4) 48,XXY

Answer 1

Among the listed karyotypes, only 46,XX is euploid, representing a typical female human karyotype with the correct number of chromosomes.

Step-by-step explanation:

The question pertains to human karyotypes and euploidy, which is the presence of the correct number of chromosomes for a given species. In humans, euploidy is 22 pairs of autosomes and one pair of sex chromosomes. Therefore, the correct karyotype exhibiting euploidy is 46,XX, which is a typical female karyotype with the appropriate number of chromosomes. The other karyotypes listed, such as 47,XY,+21 (Down Syndrome), 47,XY,+18, and 48,XXY (Klinefelter Syndrome), represent forms of aneuploidy where there is an incorrect number of chromosomes.