It is a change in a gene that specifically selected
A mutation is considered beneficial if it confers a selective advantage that improves the organism's chances of survival and reproduction in its environment. Harmful mutations typically decrease an organism's fitness and can be detrimental to its survival. The impact of a mutation on an organism's survival depends on the specific environment and circumstances in which it finds itself.
The effect a mutation has on a population depends on two factors: First, every new mutation has to overcome the effects of chance on its survival. New mutations,when they exist in only one or two individuals, are often lost from the population due to genetic drift, or chance. For example, the mutation may never make it into a gamete (egg or sperm) and be lost. Or the gamete carrying the mutation may not be involved in a fertilization. Or the individual carrying the mutation may not find a mate, or may be killed when young. It is estimated that 1 out of three new mutations, regardless of the selective advantage, may be lost this way. Secondly, the selective value of the mutation (given it has survived being lost early due to drift) can determine its affect on the population. If it is deleterious, selection will act to reduce its frequency or even eventually remove it. If the mutation is neutral, its frequency will drift up and down due to chance, eventually either being lost or fixed (reaching a frequency of 100%). If it has a selective advantage over other alleles, it may eventually become fixed as well--how long depends on the size of the population and the strength of the advantage.
The mutation in which a part of a chromosome becomes oriented in the reverse of its usual direction is called an "inversion." Inversions can occur when a segment of DNA breaks off, rotates 180 degrees, and reattaches, which can disrupt gene function or regulation. This chromosomal alteration can lead to various genetic consequences, including fertility issues or susceptibility to certain diseases.
mutations
It's called a mutation.
genetic disorder
selective transport is the transport of specific substances by means of protein channels and pumps.
The only way to become a mutant is via a mutation, but a mutation does not guarantee a unique phenotype. (I'm assuming, here, that you're using a biological definition of "mutant" and not a more fanciful definition.)
An example of a favorable mutation is the development of lactase persistence in some human populations, which allows individuals to digest lactose into adulthood. This mutation provides a selective advantage in societies where dairy consumption is common.
A chromosomal mutation in which a block of genes in a segment is in reverse order
inversion
The definition of reverse mortgage is when the bank takes out a loan based on your property. This is used for extending your mortgage beyond what it is now.
mutation: a change in the sequence of DNA to cause a unusal trait
The Selective Service Act, although the definition you give of it is a bit misleading.
Polyploidy mutation is a type of mutation that results in an organism having more than two complete sets of chromosomes. This can lead to increased genetic diversity and potentially new traits in the organism.
same in reverse direction....
no you can not