Which term describes the chromosomal abnormality of having three copies of a single chromosome? a) haploidy b) diploidy c) trisomy d) tetrasomy

The answer is C. Trisomy. This is because the outcome of this phenomena would have 47 chromosomes in the cell instead of 46. This results in the congenital malformations, serious developmental and motor delays and a high incidence of mortality.

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explanation:

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.