This condition is called triploidy. A fetus with this extra chromosome is said to be unable to survive. Here are the causes ...

7. The haploid Hybrid 128 is triploid in respect to the genus Triticum, and its nuclei probably contain three dissimilar sets of seven chromosomes each. Synapsis fails, possibly on account of the ...

Sometimes, in rare cases, additional sperm can enter an egg, which results in a triploid offspring, not twins. This embryo has an extra set of chromosomes, totaling 69; the normal number is 46.

Sometimes, in rare cases, additional sperm can enter an egg, which results in a triploid offspring, not twins. This embryo has an extra set of chromosomes, totaling 69; the normal number is 46.