Answer:
by helping them from evil practice
Answer:
In the case of HIV-1, this loss-of-function mutation has proven to be beneficial.
Explanation:
Loss-of-function mutations are those that result in a gene product that has less or no function compared to the unmutated gene. When the allele completely loses function, (null allele), it is called an amorphous mutation. Phenotypes associated with these mutations are usually recessive, except when the organism is haploid, or when the reduced dosage of the normal gene is not sufficient to produce a normal phenotype (this phenomenon is called haploinsufficiency).
As mentioned earlier, this type of mutation results in a defective gene, but the text shown in the above question shows an example of a beneficial loss-of-function mutation because this mutation provides resistance to HIV-1 infection.
Answer:
United States Environmental Protection Agency
Explanation:
Answer:
Olfactory fatigue, or nose blindness.
Explanation:
This is inability of an individual to perceive a particular smell after prolong exposure to the molecules of the odours substance.It due to gradual loss of sensitivity of the olfactory receptor cells after long exposure.
Olfactory fatigue is an adaptive process of the brain to prevent overloading of two many sensory inputs in the olfactory memory.
Therefore it blocks sensitivity of the olfactory receptors in the nasal membrane to the molecules of the usually exposed odours substances,so that new neural pathways for the newly acquired stimuli exposed to, will be created-(this is refers to as changed of neuron)
Thus it is the blockage of sensitivity of the olfactory receptors by the brain that explains reasons for lack of perception after prolong exposure.
