You are traveling again as the science officer and discover a new species on planet Barkley. You are able to obtain some cells from the organism and know that it reproduces sexually. You make a chromosome spread and from what you know about human cells, identify the various regions indicated by the arrows, create a karyotype and predict the number of chromosomes.

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Q: None

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.