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Complete this sheet and use to respond to the Lab Bench Quiz. 1. The Hardy-Weinberg equation almost never holds true in "real life" because populations and allele frequencies are always changing. However, it is useful because it provides a _____________________________________________ for studying changes in allelic frequency in a population. 2. Random, non-selective change is what happens in _____________________, or a ___________________________. This is a violation of Hardy-Weinberg assumptions. 3. Effects of random events (genetic drift) are much stronger in a population. 4. When a population mixes gametes eggs and sperm purely on the basis of chance, this is termed ______________________. When individuals CHOOSE which taxon they will mate will based on particular characteristics, this is _____________________________. 5. For a population to stay in Hardy-Weinberg equilibrium, mating must be ___________________. 6. Mutation is also a violation of Hardy-Weinberg conditions, because there can be no _____________________________________________________. 7. Mutations show more quickly in a population.

Answer :

luisvaschetto

Answer:

1. a model

2. genetic drift or a bottleneck event

3. small population

4. random mating; assortative mating

5. random

6. change in allelic frequency due to mutation  

7. small population  

Explanation:

The Hardy-Weinberg model enables us to understand the distribution of genotype frequencies in a population that is not evolving, thereby being a key null model used in population genetics. Genetic drift is a genetic phenomenon where allele frequencies change in a population depending on chance events. A bottleneck event is a type of genetic drift caused by the decrease in the population size. The genetic drift is generally stronger in small populations because this genetic phenomenon produces more dramatic shifts in allele frequencies when populations are smaller. This same phenomenon is produced by the emergence of mutations in smaller populations. Random mating, also known as panmixia, is an ideal situation where individuals mate only by chance, and thus there is no sexual selection. Random mating is a condition that is required in Hardy Weinberg equilibrium. The absence of mutations is also a requirement of the Hardy Weinberg equilibrium (because it would lead to the origin of new alleles in the population). Assortative mating is a mating pattern where individuals with particular phenotypic traits mate more frequently than expected under a random mating model.

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