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Biology 11 Ch 5.1
Genetic Processes: 5.1 Understanding Inheritance
| Question | Answer |
|---|---|
| trait | a specific characteristic or feature exhibited by an organism |
| true breeding | organisms that exhibit the same traits, generation after generation |
| cross | the fertilization of a female gamete of specific genetic origin with a male gamete of specific genetic origin |
| P generation | in breeding, the organisms initially crossed and are typically true breeding |
| F1 generation | the offspring of a cross of the P generation |
| monohybrid cross | a cross of two individuals that differ by one trait |
| F2 generation | the offspring of a cross between the F1 generation |
| dominant | the form of a trait that always appears when an individual has an allele for it |
| recessive | the form of a trait that only appears when an individual has two alleles for it |
| law of segregation | traits are determined by pairs of alleles that segregate during meiosis so that each gamete receives one allele |
| genotype | the combination of alleles for any given trait, or the organism’s entire genetic make-up |
| phenotype | the physical and physiological traits of an organism |
| homozygous | an organism that has two identical alleles of a gene |
| heterozygous | an organism that has two different alleles of a gene |