Human somatic cells have 46 chromosomes, including 22 homologous pairs and one pair of nonhomologous sex chromosomes. This is the 2n, or diploid, condition. Human gametes have 23 chromosomes, one each of 23 unique chromosomes. This is the n, or haploid, condition.
The degeneration or failure of hearing neural pathways to the brain which can occur with aging is called presbycusis, while the condition of hearing a ringing or roaring in the ears is called tinnitus.
Presbycusis is the normal hearing loos that occurs with aging. The hearing ability is more affected for high-pitched sounds. Low-pitched sounds either are affected very less or are not affected at all. The areas inside the body that may be affected to cause presbycusis are: Inner ear, middle ear or the nerve pathways to the brain.
Tinnitus is the continuous sound of ringing audible to the ears. It can be caused as a result of some other disease or due to other reasons like exposure to loud sounds, whiplash, head injuries, excessive ear wax, or medication side effects.
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The kind of fungal infection could have been the one called Aspergillus Flavus. This is so because these bacteria are commonly found growing on grains, legumes, and tree nuts. Also important to say is that these bacteria produce aflatoxins that are harmful for both humans and animals
Genetic engineering is the method used to turn of genes that cause defects.