QUESTION 2 The frequency of the individuals with phenylketonuria (PKU, a recessive genetic disease) is approximately...
Gaucher disease is an autosomal recessive disease that occurs at a frequency of 1 in 76.7, or q2 = 0.013. Let’s assume Gaucher disease is in mutation selection balance. Assuming a mutation rate of µ = 10-5, calculate the selection coefficient (s) against the allele.
Cystic fibrosis (CF) is caused by recessive loss-of-function mutations for a cell surface protein expressed in the mucus membranes of intestines and lungs. Until recently, few affected individuals survived to reproductive age. In Caucasian populations, CF affects 1 infant in 2,500 births. What is the frequency of CF homozygotes? Based on the genotype frequency, what is the frequency of the CF allele? Given a selection coefficient of 1, what would be the mutation rate needed to keep CF in the...
Q3 Question 3 1 Point In a Hardy-Weinberg situation, suppose that cystic fibrosis (a rare genetic disorder caused by having two recessive alleles) occurs in approximately 1 out of 1600 births in Canada. What is the estimated proportion of the population that would be carriers for the disorder? Q4 Question 4 2 Points For some genetically linked disorders, the survival of the heterozygous individual may be less than that of a homozygous dominant individual (while homozygous recessive individuals still have...
2.3 Problem 3 The Hardy-Weinberg equation is useful for predicting the percent of a hu- man population that may be heterozygous carriers of recessive alleles for certain genetic diseases. Phenylketonuria (PKU) is a human metabolic dis- order that results in mental retardation if it is untreated in infancy. In the United States, one out of approximately 10.000 babies is born with the disor- der. Approximately what percent of the population are heterozygous carriers of the recessive PKU allele? If you...
In a population of mice a particular locus has two alleles A1 (dominant) and A2 (recessive). There are 126 A1A1, 167 A1A2 and 88 A2A2. Is this population in Hardy-Weinberg equilibrium (3 pts)? In a population of Gragons, there are 3151 A1A1, 1678 A1A2 and 2014 A2A2 individuals. If the environment changes so that the homozygous recessive genotype suffers a reduction of fitness where its fitness is now 0.73, but the other genotypes are unaffected, what will be the frequency...
0 b) 0.21 c) 0.42 d) 0.49 e) 0.91 Problem 3: in humans, Rh-positive individuals have the Rh antigen on their red blood cells, while Rh. negative individuals do not. If the Rh-positive phenotype is produced by a dominant gene (A), and the Rh negative phenotype is due to its recessive ailele (a). what is the frequency of the Rh-positive allele if 84% of a population is Rh-positive? a) 0.04 b) 0.16 c) 0.48 d) 0.60 e) 0.84 Problem 4:...
The Kermode Spirit bear is an alternate phenotype of the species Ursus americanus (black bear) in British Columbia that has striking white fur. It was determined in 2001 that a single nucleotide change from G to A results in the replacement of Tyrosine with Cysteine at codon 289 in the melanocortin 1 receptor gene (mc1r; Ritland et al. 2001 Current Biology). This allele (W2) is recessive to the wildtype allele (W1), and occurs as a novel mutation in 1 out...
Which of the following statements regarding the Hardy-Weinberg Equation is TRUE? Answers: It can only be used when allele and genotype frequencies remain constant across generations in a population It can only be used when allele and genotype frequencies change across generations in a population It has no assumptions It mathematically shows how recessive alleles in a population decrease over time It reveals when allele frequencies change over time in a population Assuming Hardy-Weinberg Equilibrium, what percentage of individuals in...
explain 1 or 2 molecular details in how epigenetics may allow
melanoma cells to outsmart BRAF inhibitors
**This is for a genetics course
Seope: This science commentary claims that epigeneties plays a role in cancer cells becoming therapy-resistant. The language used is generalized for the non-scientist and does not include any molecular details, such as methylation of a specific nucleotide in an allele or modification of a specific histone tail amino acid. Your task (individually or in a group of...
need help with this ..
From the pages 571-587 attached below.
1a) Suppose a population of guppies was infected with a
parasite. In that population a mutation results in a parasite
resistant genotype that spreads through the population through
natural selection. A subsequent mutation in the parasite results in
a genotype that is unaffected by the newly evolved resistant guppy
genotype. What is the name of the hypothesis that explains this
host parasite “arms race”.?
1b) What is this name...