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An economy has: Labor force = 160 million Employed = 150 million a) Calculate the unemployment rate.  b) If 2 million discouraged workers stop looking for work, what happens to the unemployment rate? Explain.

In a study of flower color in a population of true-breeding red-flowered and white-flowered plants, the red color is dominant, and white is recessive. Crossing true-breeding red-flowered plants with true-breeding white-flowered plants results in an F1 generation where 100% of the offspring have red flowers. The F1 plants are self-fertilized to produce an F2 generation. In a randomly selected set of 100 flowers from the F2 generation, you observe 75 red-flowered plants and 25 white-flowered plants. What is the observed frequency of the dominant allele in this F2 population? Select the right answer and show your work on your scratch paper for credit.

Coat color in mice is controlled by the interaction of two genes: Gene #1: The black coat color allele (B) is dominant over the brown coat color allele (b). Gene #2: Expression of coat color allele (C) is dominant over masking of coat color allele (c). Genotypes CC and Cc enable the expression of coat color, and the genotype cc will mask the expression of coat color, resulting in a white mouse.  What is the expected phenotypic ratio (Black: Brown: White) that results from a cross between two black mice heterozygous for both genes?  Select the right answer and show your work on your scratch paper for credit.

Wild type blue-eyed Mary has blue flowers. Two genes control the pathway that makes the blue pigment: The product of gene W turns a white precursor into magenta pigment. The product of gene M turns the magenta pigment into blue pigment. Each gene has a recessive loss-of-function allele: w and m, respectively. A double heterozygote is cross with a plant that is homozygous recessive for W and heterozygous for the other gene. What proportion of offspring will be white? Select the right answer and show your work on your scratch paper for credit.

The ABO and MN blood groups are given below for four set of parents (1 to 4). Recall that the ABO blood group has three alleles: IA, IB, and i. The MN blood group has two codominant alleles, M and N. Its three blood group phenotypes, M, MN, and N, correspond to the genotypes MM, MN, and NN. The ABO blood groups assorts independently of the MN blood group.Using your knowledge of these genetic systems, who are the parents of a child with blood type O and M blood group? Select the right answer and show your work on your scratch paper for credit.

Crossing true-breeding pea plants with yellow peas with true-breeding plants with green peas yielded an F1 generation with 100% offspring plants with yellow peas. The F1 plants are self-fertilized and produce F2. In a randomly selected set of 100 peas from F2 you notice the following phenotypic numbers: 64 yellow and 36 green.  What is the observed frequency of the recessive allele in this F2 population? Select the right answer and show your work on your scratch paper for credit.

There are two forms of human earwax: wet and dry. W is a dominant allele that produces wet earwax. In a sample of Spaniards, you measure the following genotypes: WW= 840, Ww =120, and ww = 40. What is the frequency of the homozygous recessive genotype? Select the right answer and show your work on your scratch paper for credit.

There are two forms of human earwax: wet and dry. W is a dominant allele that produces wet earwax. In a sample of Spaniards, you measure the following genotypes: WW= 840, Ww =120, and ww = 40. What is the frequency of the heterozygous genotype? Select the right answer and show your work on your scratch paper for credit.

What is the expected probability of a double crossover event between genes A, B, and C shown below?  Select the right answer and show your work on your scratch paper for credit.

Crossing true-breeding pea plants with yellow peas with true-breeding plants with green peas yielded an F1 generation with 100% offspring plants with yellow peas. The F1 plants are self-fertilized and produce F2. In a randomly selected set of 100 peas from F2 you notice the following phenotypic numbers: 84 yellow and 16 green.  What is the observed frequency of the recessive allele in this F2 population? Select the right answer and show your work on your scratch paper for credit.