Question

campbell figure walkthrough: one mechanism for allopolyploid speciation in plants 4 parts 0.6 of 1 point part d (4 of 4) what role does nondisjunction play in the formation of a fertile allopolyploid hybrid? it doubles the chromosome number in the hybrid. it breaks down chromosomes that dont exist as homologous pairs. it causes the chromosomes to line up at the center of the cell during mitosis. it allows gametes of the two parent species to combine.

Explanation:

Nondisjunction in allopolyploid speciation can lead to the doubling of chromosome number in a hybrid. This doubling is crucial for the hybrid to become fertile as it provides homologous chromosomes for meiosis. When chromosomes don't separate properly (nondisjunction), the resulting cells have an abnormal number of chromosomes. In the context of allopolyploid hybrids, this can result in a doubling event that restores the ability to undergo normal meiosis and produce viable gametes.

Answer:

It doubles the chromosome number in the hybrid.