BIOL 1500 Lecture Notes - Selective Breeding, Radiocarbon Dating, Natural Experiment

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peachmarten992

4 May 2014

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A and b are dominant to o. Evolution: change in allele frequency of a population over time. Theorem: frequencies of alleles and genotypes in a population"s gene pool remain constant from generation to generation if the only process at work is meiosis. Question: in a population in hw equilibrium, the frequency of allele a1 is 1/3 and that of allele. The probability of two things happening is the product of their independent probabilities. P^2 + 2pq + q^2 = 1. Null hypothesis for no evolution because evolution is a change in a population"s allele frequencies between generations. 4 mechanisms of evolutionary change: natural selection, genetic drift, gene flow, mutation, non-random mating. Two alleles code for a 2 versions of a protein on the surface of red blood cells. Carbon 11 is a rare isotope with a half-life of 20 mins. It is not of any help in reconstructing the long ago past!

Related Questions

Popgen 8: suppose two alleles, C and D, control flower color, CC plants have red flowers, while CD and DD plants have pink flowers. Suppose that in a population of 1000 individuals, I count 840 pink flowered plants. Assuming that the population is in Hardy- Weinberg equilibrium, what is the frequency of the allele C? Correct answer is 0.4 but dont know how to solve for it.

Popgen 9: Popgen 9: Consider a process of one-way migration from a very large population into a small population. A gene has two alleles A1 and A2. The frequency of A1 in the small population (p-small) is 0.3, and the frequency of A1 in the large population (p-large) is 0.8. Assuming a migration rate of m = 0.1, and no mutation, selection, or genetic drift, what do you expect to see in the next generation?

Popgen 14: Recall our model of one-way migration from a large mainland onto a small island. Consider two alleles A1 and A2. The frequency of allele A1 on the mainland (p-mainland) is 0.2, while the frequency of A1 on the island (p-island) is 0.8. The rate of migration from the mainland to the island per generation is 0.1. What is the expected value of p'-island, the frequency of A1 on the island after one generation?

coffeeserval150

A mainland population of 1000 blue iguanas have the neutral alleles A1 and A2 with frequencies of A1 = 0.50 and A2 = 0.50.

A new population of blue iguanas is founded on Lizard Island with a population size of 10 males and 15 females.The neutral alleles A1 and A2 are present in the population with frequencies of A1 = 0.30 and A2 = 0.70. Migrants begin moving from the mainland to Lizard Island at a rate of 1 migrant per generation.

1. Calculate the change in frequency (?p) of the A1 allele after one generation of migration.

2. What will the new frequency (p?) of A1 be in the island population after one generation of migration ?

greenmoose774

Hardy-Weinberg Equilibrium Problems

p is the frequency of the dominant allele in the population

q is the frequency of the recessive allele in the population

p2 is the frequency of the homozygous dominant genotype

q2 is the frequency of the homozygous recessive genotype

2pq is the frequency of the heterozygous genotype

p + q = 1

p2 + 2pq + q2 = 1 Find q2 ï q ï p ï p2 ï 2pq

A rare disorder of cystic fibrosis (characterized by abnormal transport ofchloride and sodium across an epithelium, leading to thick, viscous secretions) occurs every 1 in 3,300 births. To express this trait one must be homozygous recessive (ff).

The cystic fibrosis allele is represented by f. The normal allele is F. Suppose both parents have alleles Ff. The possible combinations of alleles in the children are FF, Ff, Ff and ff. The alleles ff will cause the disease. So, although the parents do not have cystic fibrosis, they can produce children with the disease. The parents are called 'carriers' of the disease

What is the frequency of the population that carries the trait? (Ff)

BIOL 1500 Lecture Notes - Selective Breeding, Radiocarbon Dating, Natural Experiment

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