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Chapter 19 GENE
Genetics Chapter 19 Human Heredity
| Question | Answer |
|---|---|
| Population | A group of interbreeding organisms belonging to a single species |
| Gene Pool | Set of genetic information carried by the members of a sexually reproducing population |
| Allelic Frequency | Frequency of an allele is present in the population |
| Assumptions of Hardy Weinberg | Large, random mating population free from all evolutionary forces, frequencies of alleles do not change over time, After one generation of random mating, the genotype frequencies will remain p2+2pq+q2 |
| Evolutionary Forces | Mutation, Migration, Selection, Drift, a few other minor |
| Classical model | 1 allele is the best at a gene very little allelic variation |
| Balancing model | Many alleles at each gene with many heterozygotes |
| Overdominance | Where the heterozygotes are more fit than either homozygote, suggesting a high degree of variation in a population |
| Protein electrophoresis | Could determine actual genotypes, did not prove balancing |
| Neutral- mutation hypothesis | States that most variation is selectively neutral |
| Genetic Drift | The random change in gene frequency due to change (Sewell Wright), only when population is really small |
| Effective Population size | The average number of individuals in a population which contribute genes to succeeding generations. |
| Gene Flow: Three major effects | A source of "new" genetic variation in populations, tends to increase the effective size of populations, increases the similarity of allele frequencies among populations |
Created by:
tstrange
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