biot test 3 study guide

biot test 3 study guide - 1. Allele-alternate version...

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1. Allele- alternate version (different genetic sequence) of a gene 2. Codominant- A phenotypic situation in which the two alleles affect the phenotype in separate, distinguishable ways. 3. Dominant (allele)- In a heterozygote, the allele that is fully expressed in the phenotype. 4. F1 -first filial generation, the first generation offspring in a breeding experiment 5. F2 -second filial generation, the second generation offspring in a breeding experiment 6. Gene- a discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA, in some viruses). 7. Genotype -the genetic makeup of the individual 8. Heterozygous -when the two alleles in a pair of alleles are different 9. Homozygous- when both alleles in a pair of alleles are the same 10. Lethal gene- a) A mutated or otherwise defective gene that doesn't interfere with the normal functioning of gametes containing it, but which kills the developing organism in its embryonic or larval stages. b) any gene that has an effect that causes the death of the organism at any stage of life 11. Multiplealleles - therearemorethan 2 differentversionsofthesamegene. .that is the sequence of the bases is slightly different in the genes located on the same place of the chromosome. In polygenesis there is more than one gene involved and there may be multiple alleles of the multiple genes. ..which is far more complex. ..involving potentially a number chromosomes . 12. Offspring -progeny of a genetic cross
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13. Partial dominance (interaction or incomplete)- type of inheritance in which F 1 hybrids have an appearance that is intermediate A between the phenotypes of the parental varieties. 14. Phenotype -The physical and physiological traits of an organism . 15. Recessive -In a heterozygote, the allele that is completely masked in the phenotype. 16. Siblings -Brother(s) and/or sister(s) from a particular breeding 17. Test cross -Breeding of an organism of unknown genotype with a homozygous recessive individual to determine the unknown genotype. The ratio of phenotypes in the offspring determines the unknown genotype. 1. A hybrid is the product of parent organisms that are True-Breeding or PURE- BREEDING for different forms of One Trait. 2. Plants that are PURE for a trait Always produce offspring with that Trait. The term STRAIN denotes plants that are Pure for a Specific Trait. 3. Mendel produced strains by allowing the plants to Self-Pollinate for several
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This note was uploaded on 05/25/2011 for the course BIO 101 taught by Professor Faulkner during the Spring '11 term at FSU.

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biot test 3 study guide - 1. Allele-alternate version...

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