Quarter #2
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Created by:
mpettinato on May 20, 2009
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25 terms
Terms | Definitions |
|---|---|
 Dominant | a factor that masks the presence of another factor(gene) |
| allele | a contrasting form of a gene |
| genotype | the genetic makeup of an organism |
| phenotype | the physical appearance of an organism |
| homozygous | when both pairs of alleles of a pair are the same. |
| carcinogen | any substance that causes cancers |
| evolution | species that changes over time |
| gene pool | all the genes in a population |
| taxonomy | the science of grouping organism |
| Aristotle | Scientist known for classifying animals based on their habitat |
| Linnaeus | scientist who gave us the modern system of classification |
| lethal mutation | a mutation that results in death |
| codons | a three nitrogen base sequence that is found on mRNA and codes for an amino acid |
| nondisjunction | failure of chromosomes to separate during meiosis |
| heredity | transmission of characteristics from parent to offspring |
| sex chromosome | a pair of chromosome that determine the sex of an organism |
| punnet square | a diagram used to predict the probability that certain traits will be inherited by offspring |
| geneticist | Scientist who studies heredity |
| Uracil | the nitrogen base that replaces thymine in RNA |
| promoter | the enzyme that initiates DNA Transcriptase |
| biogenesis | the scientific principle that living things only come from other living things. |
| adaptation | a trait that makes an individual successful in its environment. |
| tumor | numerous abnormal cells that result from uncontrolled, abnormal cell division |
| trait | a genetically determined characteristic (flower color) |
| vestigal structure | a structure in an organism that is reduced in size and function. |
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