Tay-Sachs in infants is extremely lethal. Problems with motor function and sensory organs begin at around 7 months or so. Seizures occur around the age of 2. Death occurs when the infant reachs 5 years old.
Tay-Sachs in adults, however, is not necessarily lethal. Many of the disorders remain the same as they do in infants but the disease does not normally cause death in adults.
Yes, Tay-Sachs Disease is almost always fatal. The baby diagnosed dies normally within the first 3-5 months. If you have late onset Tay-Sachs LOTS), normally found in young adults, it will usually not affect one's lifespan. Tay-Sachs Disease is found mostly in Jewish communities, but also in Easters European communities.
babys live until five years
recessive
the example of lethal dominant mutation is huntington's disease.
yes, if untreated
pneumonia
Pneumonia
Unless treated, Rabies is lethal. I messes with the brain and does not allow the infected organism to properly function.
Huntington's disease, where the lethal allele expresses itself very late in an individuals life. Persons carrying the dominant lethal allele does not become aware of the disease until after their reproductive age. Thus, they pass the lethal allele to their children without knowing and the allele persists.
a woman who is heterozygous for the gene
Mumps wasn't used as anything. Mumps is a disease, and was at first very lethal.
Kernicterus-- A potentially lethal disease of newborns caused by excessive accumulation of the bile pigment bilirubin.
The winner of that dubious honor would probably be Smallpox.
Because the grey squirell carries a disease that is not harmful to them, but is lethal for red squirells.