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21. Assume that the phenotypes of the lady beetles shown in Figure 25.2b are encoded by...
GENETICS (#21:: included is the paragraph discussing figure 25.2b & figure 25.2b, and question #21) Humans...
GENETICS
(#21:: included is the paragraph discussing figure 25.2b &
figure 25.2b, and question #21)
Humans are not unique in their extensive variation (Figure 25.2a); almost all organisms exhibit phenotypic vari- ation. For instance, lady beetles are highly variable in their spotting patterns (Figure 25.2b), mice vary in color, snails have different numbers of stripes on their shells, and plants vary in their susceptibility to pests. Much of this phenotypic variation is hereditary. Recognition of the extent of pheno- typic...
A population of flour beetles has 1000 individuals. Normally the beetles are red in color; however,...
A population of flour beetles has 1000 individuals. Normally the beetles are red in color; however, this population has a utation in the gene for body color that results in black beetles that are designated by the rr genotype. Red body color is dominant to black so the genotypes RR and Rr result in red beetles. Assume the population is in Hardy-Weinberg equilibrium, with a 50% frequency of each allele for body color. A) --- what is the frequency of...
The allele for black spots is dominant over the allele for brown spots in lady beetles....
The allele for black spots is dominant over the allele for brown spots in lady beetles. Of 274 lady beetles observed, 188 had black spots and 86 had brown spots. If this population of lady beetles is in Hardy-Weinberg equilibrium for the spot locus, answer the following questions: To receive full marks, please show your work and explain your reasoning. (a) What is the frequency of the allele for brown spots? (1.25 marks) (b) What is the frequency of the...
The allele for black spots is dominant over the allele for brown spots in lady beetles....
The allele for black spots is dominant over the allele for brown spots in lady beetles. Of 111 lady beetles observed, 98 had black spots and 13 had brown spots. If this population of lady beetles is in Hardy-Weinberg equilibrium for the spot locus, answer the following questions: To receive full marks, please show your work and explain your reasoning. (a) What is the frequency of the allele for brown spots? (1.25 marks) (b) What is the frequency of the...
An Amazon rainforest population of leaf beetles has 100,000 individuals.
An Amazon rainforest population of leaf beetles has 100,000 individuals. The beetles exist in two color morphs, purple and green. Purple beetles live on epiphytic orchid blooms whereas the green beetles inhabit the leaves of the orchid plants. The color is controlled by two alleles at a single gene locus. The purple allele (P) is dominant to the green allele (p) 36% of the beetle population is green and the other 64% of the population is purple. Assuming the population...
The following genotypes were observed in a population: Genotype: JJ (40), Jj (45), jj (50) a....
The following genotypes were observed in a population: Genotype: JJ (40), Jj (45), jj (50) a. Calculate the observed genotypic and allelic frequencies for this population. b. Calculate the expected numbers of individuals for each genotype if this population were in Hardy- Weinberg equilibrium. c. Using a chi-square test, determine whether the population is in Hardy-Weinberg equilibrium.
In recent years, some leopard populations have suffered from aloss of habitat. You are part...
In recent years, some leopard populations have suffered from a loss of habitat. You are part of a research team that is studying the effects that decreased range has on these populations. Your team observed that a portion of one population relocated to the desert and merged with another small leopard population after its own habitat was threatened by deforestation. You have been assigned to lead the study of this new population and look at its gene pool make-up. In...
Consider a locus of interest that has two alleles: A and a. A diploid individual carrying...
Consider a locus of interest that has two alleles: A and a. A diploid individual carrying these alleles can have one of three genotypes: AA, Aa, or aa; a population will consist of some combination of AA, Aa, and aa individuals. The relatively frequency of each of these genotypes makes up the population's structure. Hardy and Weinberg independently figured out that, in the absence of forces that cause evolutionary change, the population structure will 'settle' or default to equilibrium values,...
Evolution 1. Assume this population is in Hardy-Weinberg equilibrium. In a population of 120 cats, 35...
Evolution
1. Assume this population is in Hardy-Weinberg equilibrium. In a population of 120 cats, 35 are black. Black cats have the bb genotype. Find the allelic frequency of the dominant and recessive allele. 2. Assume this population is in Hardy-Weinberg equilibrium. A litter of 10 puppies has both tipped ears (a) and floppy ears (A). If 4 puppies have tipped ears in the litter. What is the frequency of the recessive allele? 3. Assume this population is in Hardy-Weinberg...
For a particular gene associated with a degenerative neurological disorder, you surveyed genotype frequencies in a...
For a particular gene associated with a degenerative neurological disorder, you surveyed genotype frequencies in a population and found that 16 people had genotype AA, 97 had genotype Aa, 15 had genotype aa. a) Calculate the allele frequencies. b) Calculate the expected genotype frequencies under Hardy-Weinberg Equilibrium. Use the chi-square test to determine whether the observed number of people with different genotypes and expected number of people with different genotypes are significantly different (at an alpha level of 0.05). What...
GENETICS
(#21:: included is the paragraph discussing figure 25.2b &
figure 25.2b, and question #21)
Humans are not unique in their extensive variation (Figure 25.2a); almost all organisms exhibit phenotypic vari- ation. For instance, lady beetles are highly variable in their spotting patterns (Figure 25.2b), mice vary in color, snails have different numbers of stripes on their shells, and plants vary in their susceptibility to pests. Much of this phenotypic variation is hereditary. Recognition of the extent of pheno- typic...
The allele for black spots is dominant over the allele for brown spots in lady beetles. Of 111 lady beetles observed, 98 had black spots and 13 had brown spots. If this population of lady beetles is in Hardy-Weinberg equilibrium for the spot locus, answer the following questions: To receive full marks, please show your work and explain your reasoning. (a) What is the frequency of the allele for brown spots? (1.25 marks) (b) What is the frequency of the...
Consider a locus of interest that has two alleles: A and a. A diploid individual carrying these alleles can have one of three genotypes: AA, Aa, or aa; a population will consist of some combination of AA, Aa, and aa individuals. The relatively frequency of each of these genotypes makes up the population's structure. Hardy and Weinberg independently figured out that, in the absence of forces that cause evolutionary change, the population structure will 'settle' or default to equilibrium values,...
Evolution
1. Assume this population is in Hardy-Weinberg equilibrium. In a population of 120 cats, 35 are black. Black cats have the bb genotype. Find the allelic frequency of the dominant and recessive allele. 2. Assume this population is in Hardy-Weinberg equilibrium. A litter of 10 puppies has both tipped ears (a) and floppy ears (A). If 4 puppies have tipped ears in the litter. What is the frequency of the recessive allele? 3. Assume this population is in Hardy-Weinberg...
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