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: 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: In the aforementioned countries and territories, they were all occupied by Spain explored by Spain and one time occupied by Spain. As a result, the main language is Spanish and the majority follow the Catholic religion.
Answer: African-Americans is a racial term referring anyone who is black skinned and either been born in the United States or gained citizenship here. There are many who are called African-Americans whose ancestors or themselves did not come from Africa. American is a term for all citizens of the United States, no matter the race, creed, or religion. African-American replaces the term Negro which has been used for about four hundred years.
Answer: A genetic disease is inherited genetically and contagious disease means that its easily transmitted by contact. For an example, yawning is contagious, once u or any other person yawns that yawn will soon get to someone and then they will yawn.
Answer: A disease that you can transfer to your child by the DNA that you give. It is a disease that is encoded into your DNA and some of your old family members may show it or some of your kids might show it too.
Answer: This can occur through reproduction. If you have two people with the recessive gene for a rare genetic disorder, they have a 25% chance of having offspring with this disorder. The probability increases as the genetic pool increases.
Answer: Certain types of scoliosis have genetic factors, some have no genetic input, and some are only from genetics. For example, adolescent idiopathic scoliosis, which makes up about 80 percent of all cases of scoliosis, is generally from a combination of both environmental factors (i.e. posture) and genetic predisposition.
Answer: no it is not! it happens to certain people but they r still normal like others. ma girlfrend has it and she got bullied. they r like us normals man! JEEZ! leave em alone. get a grip on this horrid and cruel rumour. it happens to people but they r brave and cope with it. they r da special ones in life. from david wester, in Texas ^_^
What is the most common lethal genetic disease in US African Americans?
Answer: As there are many diseses but the most common is sickle cell anaemia. this can be transmitted from parents to offsprings when both the partners are carrier for this disese. this disese is caused due to mutation in the gene i.e. it is caused by the substitution of glutamic acid(glu) by valine(val) at sixth position of the beta globin chain of haemoglobin molecule. the substitution of acid results due to single base substitution at the sixth codon of beta globin gene from GAG to GUG. the mutant haemoglobin molecule undergoes polymerisaTION UNDER LOW OXYGEN TENSION CAUSING THE CHANGE IN THE SHAPE OF RBC FROM BICONCAVE DISC TO ELONGATED SICKLE LIKE STRUCTURE.