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science ch.4
Chapter 4 vocab./terms
Question | Answer |
---|---|
acquired trait | a characteristic that an organism develops after it is born |
chromosomes | short, thick coils of DNA |
DNA | a molecule found in the nucleus of a cell and shaped like a double helix; associated with the transfer of genetic information |
gene | a short segment of DNA that determines an organism's inherited traits |
heredity | the genetic trasfer of characteristics from parent to offspring |
mutation | a change in the genes of an organism |
nucleotide | the basic structural unit of DNA |
adaptation | a trait or characteristic that helps an organism survive in its environment |
dominant | being expressed when an organism receives genes for two different forms of a trait |
hybrid | an organism that has two different genes for the same trait |
recessive | not being expressed when an organism receives genes for two different forms of a trait |