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part B
2. (4pts) In a strain of Petunia that normally have purple flowers, recessive and...
2. (4pts) In a strain of Petunia that normally have purple flowers, recessive and dominant mutations...
2. (4pts) In a strain of Petunia that normally have purple flowers, recessive and dominant mutations at the red color locus (R locus : R+ = wildtype allele, purple) lead to different flower colors. Plants that carry a particular dominant allele Ra have pink petals. Of the individuals that carry one allele of the dominant allele Rb roughly 20% have normally colored purple petals, the remaining 80% show a range of lighter red colors. Individuals that are homozygous for Rb...
Determining if allele frequencies are changing from one generation to the next (microevolution) from the number...
Determining if allele frequencies are changing from one generation to the next (microevolution) from the number of individuals of each genotype present: The following steps are used to determine if allele frequencies are changing: Calculate Allele frequency from the number of individuals of each genotype Calculate expected genotypic frequencies and individuals in a population from allele frequencies: Test the goodness of fit between the data and the Hardy Weinberg equilibrium model generated expectations. The following problems are the calculations used...
The F1 generation is all yellow chromosomes, with just two homologous pairs, making n-2 (haploid) and...
The F1 generation is all yellow
chromosomes, with just two homologous pairs, making n-2 (haploid) and 2n -4 (diploid). Two unlinked gene loci affect flower color in this species. At the P locus found on the larger of the two chromosome pairs, the dominant P allele causes pigment to be deposited in the petals. The recessive p allele. when homozygous, results in no pigment being placed in the petals, leading to flowers with white petals. The Y locus, found on...
A plant called blue-eyed grass normally produces blue flowers. However, plants producing white flowers also occur,...
A plant called blue-eyed grass normally produces blue flowers. However, plants producing white flowers also occur, because an allele for the gene coding for the protein that produces the blue pigment is non-functional. This white-flowered allele (W) is dominant to the blue-flowered allele (w), but generally occurs at very low frequency in populations. Suppose you crossed a homozygous dominant plant with a homozygous recessive plant, and the result is 16 seeds. If you plant these, assuming simple Mendelian genetics, how...
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...
Fictional scenario: Individuals with green hair have the presence of the dominant gene "Z" and people...
Fictional scenario: Individuals with green hair have the presence of the dominant gene "Z" and people with purple hair are homozygous for the recessive allele “z”. There were 200 students in a classroom who were surveyed for their hair color and 155 people had green hair whereas 45 people had purple hair. Use the information to answer the next set of questions. Show your work for credit. 1) What are the variables for a recessive allele? A dominant allele? Homozygous...
In Mendel's pea plants, the allele for purple flowers (P) is dominant to the allele for...
In Mendel's pea plants, the allele for purple flowers (P) is dominant to the allele for white flowers (p). You cross two pea plants that are heterozygous for the flower color trait and obtain 36 peas. When you plant these peas and grow them long enough to see their flowers, you find that 25 of them have purple flowers and 11 of them have white flowers. (a) For this cross, what are the expected values for each phenotype? (1 point)...
1. (4pts) In a strain of rabbits, the allele E (long ear) at the locus for...
1. (4pts) In a strain of rabbits, the allele E (long ear) at the locus for ear length is dominant over the allele e (short ear). The spotted coat allele (s) is recessive when tested against the solid colored coat allele (S). One long eared, solid colored male rabbit is bred to three females. Female A, which has short ears and spotted coat, produces two long eared, solid colored offspring, and one short eared, solid colored offspring, Female B, which...
8. You are studying an annual wildflower population. Flower color is either red or yellow and...
8. You are studying an annual wildflower population. Flower color is either red or yellow and is controlled by a single locus with 2 alleles: R and y. Red is dominant to yellow, and both homozygous RR individuals and heterozygous individuals have red flowers, while yy individuals have yellow flowers. You have been studying this population for a long time and have seen fairly consistent allele frequencies for these two colors, with R=0.65 and y=0.35. Two years ago, a new...
For this exercise we will be re-enacting founder effect on a population of hypothetical people. You...
For this exercise we will be re-enacting founder effect on a population of hypothetical people. You can use red and white beans (or any other small household item that comes in two colors) to complete the exercise. The beans will represent genes and the different colors will represent different alleles (gene variants). Red beans will represent the dominant (R) allele for the trait, while white beans will represent the recessive (r) allele. Humans have two copies of each gene, so...
2. (4pts) In a strain of Petunia that normally have purple flowers, recessive and dominant mutations at the red color locus (R locus : R+ = wildtype allele, purple) lead to different flower colors. Plants that carry a particular dominant allele Ra have pink petals. Of the individuals that carry one allele of the dominant allele Rb roughly 20% have normally colored purple petals, the remaining 80% show a range of lighter red colors. Individuals that are homozygous for Rb...
The F1 generation is all yellow
chromosomes, with just two homologous pairs, making n-2 (haploid) and 2n -4 (diploid). Two unlinked gene loci affect flower color in this species. At the P locus found on the larger of the two chromosome pairs, the dominant P allele causes pigment to be deposited in the petals. The recessive p allele. when homozygous, results in no pigment being placed in the petals, leading to flowers with white petals. The Y locus, found on...
Fictional scenario: Individuals with green hair have the presence of the dominant gene "Z" and people with purple hair are homozygous for the recessive allele “z”. There were 200 students in a classroom who were surveyed for their hair color and 155 people had green hair whereas 45 people had purple hair. Use the information to answer the next set of questions. Show your work for credit. 1) What are the variables for a recessive allele? A dominant allele? Homozygous...
In Mendel's pea plants, the allele for purple flowers (P) is dominant to the allele for white flowers (p). You cross two pea plants that are heterozygous for the flower color trait and obtain 36 peas. When you plant these peas and grow them long enough to see their flowers, you find that 25 of them have purple flowers and 11 of them have white flowers. (a) For this cross, what are the expected values for each phenotype? (1 point)...
1. (4pts) In a strain of rabbits, the allele E (long ear) at the locus for ear length is dominant over the allele e (short ear). The spotted coat allele (s) is recessive when tested against the solid colored coat allele (S). One long eared, solid colored male rabbit is bred to three females. Female A, which has short ears and spotted coat, produces two long eared, solid colored offspring, and one short eared, solid colored offspring, Female B, which...
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