Chapter 5 Life's Structure and Function
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connierose on January 31, 2012
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15 terms
Terms | Definitions |
|---|---|
 allele | The different forms of a trait that a gene may have |
| dominant | a trait that covers up the recessive trait |
| genetic engineering | scientists change the arrangement of DNA that makes up a gene |
| genetics | the branch of biology that studies heredity and variation in organisms |
| genotype | genetic makeup of an organism |
| heredity | the passing of traits from a parent to child |
| heterozygous | an organism that has two different alleles for a trait |
| homozygous | an organism that has two of the same alleles |
| hybrid | an organism from two parent organism that have different expressions of traits. |
| incomplete dominance | one allele is not completely dominant over the other allele |
| phenotype | what an organism looks like as a consequence of its genotype |
| polygenic inheritence | when lots of genes act together to produce a specific trait |
| Punnett square | A chart that shows all the possible combinations of alleles that can result from a genetic cross |
| recessive | trait that will only appear in the phenotype if organism inherits two of them; covered up by the dominant gene |
| sex-linked gene | gene located on a sex chromosome |
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