Answer: It could happen in two main mechanisms:1) the allele responsible for the disease is recessive and so each of the parents are healthy portators of the allele (heterozygous), and all the sons which are homozygous for the allele (i.e. have two copies of the allele), with a frequency of 1:4, will be affected by disease, but not the others (heterozygouses and homozygouses for the good allele or wild type).2) the mutation responsible for the disease (that acts in a dominant manner) is not present in any of the parents but happens only during the formations of gametes, and so will be transmitted to the son.There are also other mechanisms that are less frequent and more difficult to explain in a few words.
Answer: Not always. It depends if the individual is a hybrid- meaning they have both the dominant and the recessive gene. They can pass on the recessive gene instead of the dominant one, and assuming the other parents also passes on the recessive gene, the child will not inherit the disease.
Answer: Hungtington disease is a trinucleotide repeat genetic disorder, in which you have extra repeats of CAG in your gene coding for the hungtin protein.If you have more than 35 repeats you get the phenotype (symptoms), and it shows anticipation, which means that as the disease is passed on from generation to generation the repeats increase, hence the severity of the disease.It is quite rare, but the exact incidence is hard to estimate, because people carrying 30 repeats are asymptomatic.Hope this helps
Answer: one does die of alzheimers disease, if they are taken good care of, they wont die of anything else memory related. once alzheimers disease progresses to the autonomic nervous system(involuntary)the one that controls breathing,heartrate,vasoconstriction and dialation, it kills you. it does directly kill you eventually, it will stop your heart or lungs. most people arent taken care of enough to let them get to that stage. and they do die of a self inflicted injury(falls,hyperglycemia,pneumonia etc.)
Answer: Genetic counseling is advised when there is a family history of muscular dystrophy. Women may have no symptoms but still carry the gene for the disorder. Duchenne muscular dystrophy can be detected with about 95% accuracy by genetic studies performed during pregnancy.
Answer: Mercers? Im sure what you are asking about is MRSA, it ismethicillin-resistant Staphylococcus aureus Staphylococcus aureus, often referred to simply as "staph," arebacteria commonly carried on the skin or in the nose of healthypeople. Occasionally, staph can cause an infection; staph bacteriaare one of the most common causes of skin infections in the UnitedStates. Most of these infections are minor (such as pimples andboils) and most can be treated without antibiotics (also known asantimicrobials or antibacterials). However, staph bacteria can alsocause serious infections (such as surgical wound infections andpneumonia). In the past, most serious staph bacteria infectionswere treated with a certain type of antibiotic related topenicillin. Over the past 50 years, treatment of these infectionshas become more difficult because staph bacteria have becomeresistant to various antibiotics, including the commonly usedpenicillin-related antibiotics (1). These resistant bacteria arecalled methicillin-resistant Staphylococcus aureus, or MRSA.
Answer: MRSA infections are resistant to an antibiotic called methicillin and also to many other types of antibiotics. Resistance means that the bacteria are not killed by the antibiotic.
MRSA strains of bacteria are no more aggressive or infectious than other strains of S. aureus. However, infections are much more difficult to treat because many antibiotics do not work. Infections with MRSA can sometimes become more severe than they may otherwise have been if the cause of the MRSA infection is not diagnosed early and antibiotics that are not effective are given at first. In some cases, it can lead to serious health problems such as blood poisoning and infections of the lungs, bones or the heart valve. A small number of people die from the effects of MRSA
Answer: The CDC is responsible for tracking and identifying diseases to prevent the spread of the diseases. They also have a role to bring awareness of these infectious diseases. They chart the numbers of people who have contracted the disease and the numbers of people who have died from them, etc.