Banana plants, which are triploid, are seedless and therefore sterile. Propose a possible explanation.

The correct answer will be - homologous chromosomes fail to pair.

Explanation:

The seedless variety of the banana are triploid that is each cell contains three copies of the chromosomes. The triploid variety of the organism is considered sterile or not able to produce offspring as they are unable to generate gametes for fertilization.

The formation of gametes relies upon a type of cell division called meiosis which proceeds in four phases of karyokinesis stage.

At metaphase of the meiosis, chromosomes fail to pair at the equatorial plate as two chromosomes pair leaving one extra chromosome which is not paired. The gametes are produced with unequal chromosomes and on fertilization zygote is not formed.

Thus, homologous chromosomes fail to pair is the correct answer.