1- Calculate the frequency of the recessive and dominant allele in the.pdf

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1. Calculate the frequency of the recessive and dominant allele in the population. (round to nearest hundredth) 1. Calculate the frequency of the recessive and dominant allele in the population. (round to nearest hundredth) 1. Calculate the frequency of the recessive and dominant allele in the population. (round to nearest hundredth) 2. Calculate the percentage of heterozygous and homozygous dominant individuals in the population. please show all your work :) thank you Jse the following information: Every person has two copies of the cystic fibrosis transmembrane conductance regulator (CFTR) gene. A person must inherit two mutated copies of the CFTR gene (one copy from each parent) to have cystic fibrosis (CF). Cystic fibrosis is an example of a recessive disease. That means a person must have a mutation in both copies of the CFTR gene to have CF. People who inherit one copy of the CFTR gene that contains a mutation and one normal copy are considered CF carriers. CF carriers do not have the disease but can pass their copy of the defective gene on to their children. In people with CF, mutations in the CFTR gene disrupt the normal production or functioning of the CFTR protein found in the cells of the lungs and other parts of the body. This protein is responsible for regulating the flow of salt and fluids in and out of the cells in different parts of the body. Mutations in the CFTR gene cause the CFTR protein to malfunction or not be made at all, preventing normal movement of salt and fluids. This leads to a buildup of thick mucus, which in turn leads to persistent lung infections, destruction of the pancreas, and complications in other organs. Suppose you are a doctor researching CF in North American populations. You determined in previous research studies that the typical allele frequency of the mutant CF allele ( f ) among Caucasians is 0.025 , while the frequency of the normal allele ( F ) is 0.975 . You sample a population of New York City residents, and you determined that 4,810 individuals have a normal phenotype, while 190 individuals exhibit CF. Answer the following questions..

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3. Cystic fibrosis is a hereditary disorder that is recessive affecting the lungs and digestive tract. People with cystic fibrosis have a mutation in the CFTR gene (transmembrane conductance regulator) that causes the CFTF protein to malfunction. Determine the genotypes of the parents and offspring for the following family scenarios in a and b below. Use ' C ' to indicate a dominant allele and ' C ' for a recessive allele). a. One parent with the recessive condition and the other parent who does not have the disorder have 2 children. Both children have Cystic fibrosis. 8 marks b. Two parents who do not have Cystic fibrosis have 4 children where 1 child has Cystic fibrosis. 10 marks NOTE: You must draw a Punnet square to determine the possible genotypes of the children. When two alternative genotypes are possible for an individual, indicate both. .

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Respond to your colleagues and respectfully agree or disagree with your colleague’s assessment and explain your reasoning. In your explanation, include why their explanations make physiological sense or why they do not At least 2 references in each peer responses! Cystic Fibrosis is an autosomal recessive disease that affects chromosome 7 on the DNA helix. The parents of the child with cystic fibrosis are both carriers of the disorder and likely have no symptoms and have no idea they are carriers. The disease is caused by a mutation in cystic fibrosis transmembrane regulator (CFTR). The CFTR regulates the flow of salt and fluids in and out of the cell. The CFTR protein provides instructions for the channel than transports negatively charged particles called chloride ions in and out of the cell and across the tissues. The lack of this channel causes the build-up of thick and sticky mucus because chloride helps with the movement of water across the tissues that assist with thinning the mucus. (CF Genetics: The Basics, 2020) The organs that are affected most frequently are the lungs, digestive organs, pancreas, and reproductive organs. The thick mucus causes frequent lung infections and the cyst in the lungs. The thick mucus blocks the ducts of the pancreas and prevents the transport of digestive enzymes leading to malnutrition. The production of insulin is also affected by the thick mucus and cystic fibrosis patients can develop diabetes-related to this. Males with cystic fibrosis are infertile due to mucus plugging the vas deferens. Female with cystic fibrosis frequently have difficulty during pregnancy (Cystic Fibrosis, 2020). Cystic fibrosis is a recessive disease and both parents must be carries to produce a child who has cystic fibrosis. The chances of two carriers having a child with cystic fibrosis are 25% and the chances that the child will have a 50% chance they are a carrier of the mutation and a 25% chance that the child will not be a carrier or have the disease. The person with cystic fibrosis has a child with a cystic fibrosis carrier then they have a 50% chance the child will have cystic fibrosis and a 50% chance they will be a carrier (Cystic Fibrosis, n.d.). Cystic fibrosis is common in the Caucasian population with a frequency rate of 1 in 2500-3500 births. African American have a frequency rate of 1-17000 and Asian population have a frequency rate of 1-3100 births (CF Genetics: The Basics, 2020) .

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Clearly explaination plsss!!! 1. Cystic fibrosis (CF) is an inherited chronic disease that affects the lungs and digestive system of about 30,000 children and adults in the United States. It is caused by a recessive allele that encodes a defective chloride channel. Genetic screening has determined that two parents are carriers (heterozygous for CF). What is the probability that they have a child with CF? 2. When crossing true-breeding yellow seeded peas with true-breeding green seeded peas, the F1 generation all have yellow seeds. What genotypic and phenotypic ratio would you expect in the F2 generation? 3.You work in a fruit fly lab. Every once in a while you notice a fly that has a golden body color. Early one morning, you have the great fortune of finding two such flies: one a male, and the other (in another culture) a female. Delighted, you cross one with the other and 48 progeny result: 34 golden and 14 normal color. a. Which trait do you think is dominant: golden or normal color? b. What do you think are the genotypes of the parents and their progeny? c. What phenotypic ratios would you have expected from your answers to a and b? d. How could you test your answer to b by genetic crosses?.

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