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What chemical in chocolate is harmful to dogs?
Theobromine is present in many, if not all, forms of chocolate. It is incredibly lethal to Dogs and is one of the primary reasons in which chocolate is lethal to most, if not all, breeds of canine.
Do all frame overo horses carry one lethal gene?
The Overo allele is only lethal when the foal inherits a copy from both parents. A heterozygous foal is a normal frame overo.
What are the four types of chromosomal mutations?
There are four different types of chromosomal mutations: Deletions, Translocations, Duplications and Inversions
Why are mutations useful in selective breeding?
Because without mutations, selective breeding would be almost impossible.
Which mutation is the most dangerous?
There is no definite answer to this question many types of mutations can cause death and I'd say that's the most dangerous effect of a mutation. Large Scale mutations, like deletions or amplifications, usually cause the most damage because they effect whole chromosomes. Small Scale mutations are usually less dangerous because they only effect one gene. The worst small scale mutations are insertions and deletions because they change the reading frame. In my personal opinion, harmful mutations that occur in the tumor suppressor genes are the most dangerous because they are what prevent the mutations in cell from being duplicated and without them working a mutated cell can replicate uncontrollably.
How do lethal mutations and neutral mutations differ?
Lethal mutations cause such a radical change that the organism cannot live with it and dies. A neutral mutation is a simple change that does not affect the organism in any way, such as a new eye colour.
Do autosomes have lethal recessive genes?
Yes. Autosomes CAN have lethal recessive genes, but that does not mean they always contain recessive mutations.
Why isn't there trisomy 5 or 17 in human population?
They are lethal chromosomal mutations.
Which mutations are NOT subject to natural selection - lethal physiological neutral or morphological?
Neutral mutations confer no benefits or handicaps and are therefore not affected by natural selection.
Are all mutations bad.?
No not all mutations are bad there are good mutations and bad mutations
If a heterokaryon is made by crossing two mutants that have mutations in different genes of the adenine synthesis pathway the phenotype of the heterokaryon will be?
lethal
What are embryonic lethal mutations?
Death of the individual as an embryo, usually not seen due to it being dead in carrying mother's womb.
How mutation affect survival skills of an organism?
It depends on the mutation. Some mutations have no effect on survival, some mutations are lethal, and some mutations make an individual better adapted to its environment, so it will be more fit than those without the mutation, and therefore produce more offspring with the same mutation, which could change the allele frequency of a population.
Is point mutation lethal?
No. Point mutations, or those resulting from a change in one or a few nucleotides at a single location in a DNA sequence. There are two types of point mutations: base substitutions and frameshift mutations. Not all mutations are in these coding sequences but if they are, then the result can be different or non-functioning proteins. They are considered to be neutral, beneficial or harmful. Two harmful point mutations are sickle cell anemia and polycystic kidney disease.
Are all mutations generic?
Yes. All mutations of the genetic material are genetic.
What percent of mutations are lethal to a cell?
"...999/1000 are harmful or fatal and the remainder may be beneficial. (Remine, The Biotic Message, page 221."
How can mutations affect an organism?
It depends on if it is in the germ line or in a somatic Cell. In the germ line a mutation can cause birth defects or lethal mutations. In somatic Cells it can cause cancer. The Genetic Mutation will have either of these effects: either beneficial or detrimental.
