What best defines genetic diversity? the variety of traits a species has. a group of organisms of one species. all the different plants, animals, fungi, and microorganisms. all the different habitats and ecosystems found around the planet.

Genetic diversity is best defined as the variety of traits a species has.

Genetic diversity is increased in sexually reproducing organisms by events such as crossing over in Prophase I of meiosis, independent assortment of chromosomes at the metaphase plate, and random fertilization. This creates a unique combination of alleles from the mother and father passed to the offspring, which increases genetic diversity, or the varying traits that different members of a species exhibit.

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Three reasons of the deaths of native americans: new illnesses that their immune systems couldn't cope with. genocides so the settlers could have the good land.starvation from lack of rations and poor infertile land on resevations

They get pregnant at younger ages