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Why are lethal homoygous recessive disease are rarley elimimated from a population?
Because as they are homozygous recessive they are only lethal when a person inherits an allele from both parents, meaning that each parent must be heterozygous carriers of the gene, and even then it's only a 1 in 4 chance that the offspring will be homozygous recessive and therefore it's unlikely they will die. And if they do not die then the will survive to likely pass on the gene.
What else can I help you with?
Is alkaptonuria caused by a recessive or dominant allele?
Phenylketonuria is an autosomal recessive genetic disorder. The enzyme phenylalanine hydroxylase is necessary to metabolize phenylalanie, but when this enzyme doesnt work, phenylaline accumulates and is detected in the urine. The disease is detected during pregnancy, and if treated right away the newborn can develop normally. However, if left untreated, the brain will not develop properly.
What is the chance that their child will be a carrier of the disease if both parents suffer from the disease?
If they are expressing the trait, 100%, as their genotypes would be, rr X rr If they both carry the trait and it is dominated, Rr X Rr, then the probability would be, 25% of their child expressing the trait.
This pedigree is for a human genetic disease called sickle cell anemia. Assuming that the allele for the disease is recessive how many of the females shown have the disease?
None. =]
How can you use recessive trait in a sentence?
Althought the diabetes skipped many generations in my family, it was apparently a recessive trait because the newborn was diagnosed with the disease.
Is sickle cell disease autosomal or x-linked or chromosomal?
Sickle cell disease is an autosomal recessive disorder, meaning that it is caused by a mutation in one of the autosomal chromosomes (chromosomes that are not sex chromosomes). In the case of sickle cell disease, the mutation occurs in the gene encoding the beta-globin subunit of hemoglobin on chromosome 11.
Is wilsons disease dominant or recessive?
Wilson's disease is recessive
Does TaySachs disease have a dominant or a recessive trait?
recessive
Is the trait for bleeder's disease dominant or recessive?
Recessive
A recessive lethal gene exists in a population and remains for several generations Which woman could have passed the recessive lethal allele to offspring but not have the disease herself?
a woman who is heterozygous for the gene
Is cystic fibrosis an autosomal disease?
Yes, cystic fibrosis is an autosomal recessive disease.
What types of disease is cystic fibrosis?
Cystic fibrosis is an autosomal recessive genetic disease. A+ neuromuscular disease
Is sickle cell disease dominant or recessive?
The disease is recessive, requiring both parents to carry the allele for the disease to be found in the offspring. If one parent has it, the offspring can also be a carrier, but it will be recessive, and the offspring will have normal RBC (red blood cells)
Is canavan disease dominant or recessive?
its ressesive
Is heart disease dominant or recessive?
It is Dominant.
What type of autosomal disease is phenylketonuria?
recessive
Is cystic fibrosis carried on a dominant of recessive gene?
Cystic fibrosis is an autosomal recessive genetic disease.
Many serious diseases can be passed from parent to offspring through genes. In which case given below is a recessive disease NOT able to be passed on?
A recessive disease is not able to be passed on if both parents are carriers of the gene but do not express the disease themselves. In this case, the offspring would only inherit the disease if they receive two copies of the recessive gene, one from each parent. If the child inherits only one recessive gene and one dominant gene, they will be a carrier but will not exhibit the disease. Thus, the disease can only be passed on if both parents contribute the recessive allele.
