Unit 4: Traits, Reproduction, & Genetics

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Across
  1. 4. When there are two identical alleles present (aka homozygous)
  2. 5. A scientist who studies genetics
  3. 7. The production of a new offspring from ONE parent organism
  4. 8. a factor that controls traits
  5. 11. when an egg cell (female) and a sperm cell (male) combine to form a new organism (offspring).
  6. 12. Different forms of a gene
  7. 14. The process by which humans breed organisms to make specific traits more or less common
  8. 16. A trait that makes it more likely that an individual will survive in a specific environment
  9. 18. to receives genes from a parent
  10. 21. An adaptation that involves the way an organism acts in order to survive
  11. 22. The process in which the distribution of traits in a population changes over many generations
  12. 23. When there are two different alleles present (aka heterozygous)
  13. 25. The scientific study of heredity
  14. 27. Having alleles that are different (aka hybrid)
  15. 28. a tool in which all of the possible outcomes for a genetic cross between two individuals with known genotypes are given.
Down
  1. 1. trait/allele that will sometimes be hidden in an organism’s traits. The only way you can see a recessive trait is to get a recessive allele from BOTH parents. Symbolized with a lowercase letter.
  2. 2. The production of a new offspring from TWO parent organisms
  3. 3. An adaptation that involves a physical characteristic like color or shape
  4. 6. Any slight difference in traits between individual organisms
  5. 8. When humans alter an organism’s genes so it has different traits
  6. 9. The process by which populations of organisms change over time due to natural selection
  7. 10. an organism produced as a result of reproduction
  8. 13. a random change to a gene that sometimes results in a new trait (not always something bad)
  9. 15. The passing of physical characteristics from parents to offspring
  10. 17. trait/allele that will always show up in an organism’s traits. Symbolized with a CAPITAL letter.
  11. 19. A specific characteristic of an individual organism
  12. 20. Having alleles that are the same (aka purebred)
  13. 24. An organism's physical appearance
  14. 25. An organism's genetic makeup or alleles
  15. 26. A number that describes how likely it is that an event will happen