Natural selection

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Across
  1. 4. a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes
  2. 5. An organism that possesses two different alleles for a specific gene
  3. 6. the production of new living of organisms by combining genetic information from two individuals of different types (sexes)
  4. 8. having two identical alleles of a particular gene or genes
Down
  1. 1. the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations
  2. 2. the process through which populations of living organisms adapt and change
  3. 3. a British naturalist who proposed the theory of biological evolution by natural selection.
  4. 7. the change in heritable traits of biological populations over successive generations