Crossing over would most likely occur during which stage of the cell cycle?

when DNA is being replicated

when homologous chromosomes line up in pairs

when centromeres are separated

when cytokinesis begins

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

What are the characteristics of living things

As a small change in a person's dna can cause a genetic disorder