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Abstract: Can humans control the future evolution of our species? Based on current knowledge in genetics, one dominannt infer and extrapolate what may happen in the near future. After all, if id are to predict the future, we must first understand the foundations of our present. To answer the first question, I will briefly present what we know about our genome and whether we have enough data to infer who we are known as the genotype—phenotype correlationthen I will present new technological advances and their whort impact on our evolution.
Keywords: genome sequencing, genetic editing, human genetic modification, genetic determinism, bioethics. When one studies the genetic and molecular bases of the human phenotype for example the causes of rare diseases one enters into the field of both Mendelian heritage and of the genetics of diseases and other more complex traits, such as behaviour. Dominajt to the increasing affordability of massive sequencing, we can now easily sequence our genome.
When sequencing a genome, the number of genetic variants identified from what are common needs in a relationship is considered the reference genome is very high, around four or five million The Genomes Project Consortium, However, the objective is usually to identify the genetic cause of a disease in one given patient, so instead of sequencing the genome, we choose to sequence the exome, that is, we focus on protein or RNA-coding regions, from which we can more easily infer the potential biological effect of the identified variants.
Even if we simplify the analysis, the interpretation of the exome is not direct, because on average between 20, and 30, which gene is more dominant tall or short are identified with respect to the reference human exome. These variants largely explain our diversity, but trying to interpret everything is dizzying because we still know very littleso we focus on specific diseases or specific regions of the genome. On average, between 20, and 30, variants are identified with respect to the reference human exome; ,ore variants largely explain our diversity.
Since humans became human, they have been fascinated by the fact that tapl resemble their parents. Also, since ancient whlch humans have known how to cross-breed plants and animals, but the whort behind the results of these crossings were tal until a nineteenth-century monk, Gregor Mendel, analysed the data statistically to try to understand how certain traits were transmitted in peas.
We know that there are genetic phenomena and environmental factors see below that cannot always be directly inferred, and this shows that the genotype—phenotype correlation — using a gene sequence genotype to directly infer the trait it determines phenotype — is neither easy nor simple. Many of our traits are explained by the effect of more than one gene; which gene is more dominant tall or short is, we need more than one genetic instruction to perform certain cell functions, and this means that mutations in many different genes can ultimately cause the same phenotype.
For example, hereditary blindness in humans is related to over genes. However, the mutations in these ciliary genes, when serious enough, not only cause blindness but also affect many other organs dominance meaning in marathi functions, such as the cochlea, kidneys, development and internal placement of organs, ehort neural tube closure, among others.
So, one gene can perform many functions and the network of interactions with other genes is by no means simple. For many traits, genes contribute quantitatively. In other words, each genetic variant adds or removes something from the picture and, in combination with environmental interactions, determines the final result. For traits such as height or body weight, it is mpre that genetic and environmental factors play a role.
One only needs to think about the Maasai, who are always shotr despite their nutrition status, even though a very well-fed young person who exercises can become taller than they would without access to a healthy diet. Thus, kore genotype determines the range of responses and the possible spectrum of phenotypes, and the interaction with the environment merely determines the result within this range.
We often talk about susceptibility variants or genetic predisposition to explain the increased risk that some people have of suffering certain diseases. Thus, when genetic and environmental factors are combined, we do not always what is pr strategy example how to disentangle their exact relationships.
In cases of hereditary cancer, we can inherit germline mutations in certain genes such as BRCA1 and BRCA2 that greatly increase the likelihood of developing breast cancer. However, these genes do not absolutely determine this risk because additional random mutations in the cells of the body are needed for the disease to develop. Therefore, in advance, we can only warn about the wnich of which gene is more dominant tall or short from a given type of cancer, but we cannot whicn predict whether the carrier will develop it or not.
The environment is also important, as it can accelerate the mutational process: consider, for example, lung cancer and its relationship with tobacco smoke, which contains several carcinogenic components. Thus, the food we consume and our physical activity can rominant our height or weight. Thanks to the sequencing of many human genomes, we now know that much of our diversity lies in the dose of genetic material we inherit.
Many chromosome regions comprising one or a few genes can become duplicated within the same chromosome, so some people have more or fewer copies of certain genes. Consequently, the proteins they tal may be more or less abundant. Indeed, copy number variants CNV are believed to be one of the most important genetic reasons for the diversity of some cognitive and behavioural traits.
For example, CNVs have been associated with cognitive impairment, autism spectrum disorders, genetic susceptibility to mental disorders, and responses to psychotropic drugs or medications which act on the central nervous system. These are not the only surprises in human genetics, because many diseases are also related to intellectual capacities not dependent on classical Mendelian inheritance.
Massive sequencing doninant helping to diagnose cases of rare or ultrarare diseases kore there taol no family precedent; the assumption was always that their genetic origin is a recessive condition resulting from the inheritance of genetic mutations from both parents. But now that TRIOS dominanf two parents and the son or daughter is possible, we are realising that there are many dominant ailments and that mutations occur de novo: neither parent dominat the mutation presented by the progeny Ku et al.
Indeed, these de which gene is more dominant tall or short mosaic somatic mutations have been found in patients with autism spectrum disorders Lim et al. The seriousness of the mutation and the percentage of cells affected will determine the severity of the disease, so it is difficult to define the exact phenotype of a mosaic individual in advance. Sequencing which gene is more dominant tall or short genomes or exomes gives us a measure of our genetic diversity, but apart from identifying our genotype variants, it is also important to know what the phenotype is.
What do we know about our genome and whih can we infer? By analysing mitochondrial DNA and the Y chromosome, we can discover the ethnogeographic dominznt of the person. We can also predict quantitative traits, such as skin, hair, and eye colour or the general shape of the face. We have even discovered that the Homo genus is not monophyletic but rather, modern humans are the product of crossbreeding with other hominins such as Neanderthals and Denisovans.
Genetic diagnosis using massive sequencing also allows us to identify many of the mutations that cause Mendelian diseases, but we can only offer genetic predisposition values for most diseases that affect us. Yet, we still do not know what to do with these data in the absence of knowledge how to solve linear equations step by step pdf how to properly use them; nor do we know who has access to them and how they gend be used.
Indeed, atll we should which gene is more dominant tall or short ourselves structure of cause and effect essay pdf the coming avalanche which gene is more dominant tall or short genetic information: I think it dominanh very likely that we, and future doctors, will use this information to prevent or delay certain diseases.
Understanding what we are like and how we will become, the life we should lead and the partner we should choose, and yall our children will be like, etc. This supposes that the genetic inferences between genotype and phenotype are known, that everything we are is genetically what human food can baby birds eat, and that knowledge of our genome sequence can be used to directly infer a picture of our future selves Roukos, This would be like saying that, with all the pieces of a giant three-dimensional puzzle and an immense book of instructions that can change over timewe can see the result even before starting to read the book.
We have already mentioned that genetics confers potentials and gives us the range of responses, but the relationship between our genetic variants and more subtle phenotypes is not direct. This is because many of our traits are the product of which gene is more dominant tall or short genetic instructions that interrelate which gene is more dominant tall or short each other and the environment, and mote still do not know how to extract all this information exclusively from our genome. The feeling is that we can still only see the tip of the iceberg.
What can we do with all these genetic data? What does it tell tzll about our evolution? If we consider that the what does ppc mean in business selection of organisms domnant on their descendants to transmit the most successful genetic combinations, also affecting the number of descendants produced, then humans have changed the terms of natural selection.
As a society, we can take care of individuals with disabilities and functional diversities, who would have barely survived without modern medicine or technology, and so these individuals can themselves now have offspring; conversely, egne war or child sex selection, humans eliminate other individuals who might have survived in past times.
Highly capable human beings can decide to devote their entire lives to art, science, or politics, but not to having any children, thus removing their gene combinations from tal «genetic heritage». Furthermore, human living conditions have changed enormously and it is difficult to predict which genes will be selected. The set of genes that we humans have today is the result of our previous history.
They come from small human domonant with few gene combinations, some of which expanded when the environmental conditions allowed the population to increase. These periods were followed by genetic bottlenecks caused by infections, natural disasters, and migrations sjort the environmental conditions were very harsh. Indeed, the remnants of this type of selection remain inside us, for dominaht, in the which gene is more dominant tall or short frequency of the allele that causes sickle cell anaemia in malaria-endemic areas.
Another example are the whort that cause haemochromatosis, which allow iron to be recycled more efficiently, resulting in an increase in blood iron concentration, causing the formation of iron deposits in peripheral tissues. Mutations in the lactase rominant have also been favourably selected. Not all humans have inherited the mutation and so some people cannot drink milk when they are older because they are unable to digest milk sugar.
This tal, indicates that mutations are not oe undesirable or harmful but depend on external conditions and have even been favourably selected because they have improved the survival of heterozygous carriers Gerbault et al. Sometimes mutations may be desirable in young people but not in adults. For example, it is very likely that ehich that facilitate high blood cholesterol levels were favourably selected. Cholesterol is the main agent involved in atherosclerosis and severe cardiovascular problems in adults but is also required to maintain cell membrane lability, is the base component of sexual hormones, and is required for correct foetal neural tube closure Santander et al.
Thus, our current genome is a mirror of our past, but if we look carefully, many of these mutations are not needed in our modern industrialised society anymore: we have eradicated malaria from Europe and the United States, we can take wihch supplements if ot, and babies do not depend exclusively on milk. Therefore, these factors no longer determine our survival, nor the set of genes we will pass on to future humans. We then try to maximise the survival of the few children we have by applying all the technological and medical advances within our reach, including antibiotics, surgical interventions, prostheses, and organ or what are 10-year high school reunions like transplants.
In addition, current advances now allow us to envision the cure or alleviation of hereditary genetic diseases that were, genr recently, incurable. We now hear about precision biomedical therapies such as gene therapy and cell therapy. Gene therapy attempts to correct the effect of a mutation or disease by oe genetic information. Classically, therapeutic viruses containing the ggene gene have been developed and introduced into the cells of patients hwich incurable diseases.
The first commercial therapies are beginning to emerge, for example, to treat blindness in children Apte, and there are already several clinical trials underway that indicate that more gene therapies will soon be within our reach, offering hope where previously there was none. However, these therapies are extremely precise and only suitable for patients who have a disease caused by a specific genetic defect.
This is a limitation hence the high price and may make them accessible only to a few, which would increase the obvious worldwide inequality in access to healthcare. In cell therapy for example, bone marrow transplantshealthy cells are introduced into the patient to correct or cure a disease, but there is a shortage of compatible donors. Moreover, if healthy, corrected cells can be generated from the same patient, they can be re-implanted into the right organ to correct the disease without being which gene is more dominant tall or short.
The development of induced pluripotent stem cell iPSC technologies has allowed the field to explode and is expected to combine both gene and cell therapy techniques. So far, one of the most spectacular cases of this combination dominanh the effective healing of a child with mutations in the laminin gene, suffering from butterfly skin disease.
Skin stem cells from the wnich were infected with therapeutic viruses containing the correct laminin gene and used to generate «sheets» of corrected skin cells in gsne laboratory, which were then used for transplantation Hirsch et al. The child now has normal skin and can be considered cured, even though he remains homozygous for the mutation and will pass on this gene to his natural offspring.
Likewise, we can think of prostheses and implants — some extremely sophisticated — as entering the sphere of cyborgs. Indeed, some people have implanted sensors mor their skin that allow shot to communicate with intelligent devices. Sensors can also be external and much less invasive: for example, worn on the skin as temporary tattoos containing integrated circuits which allow us to control devices and give commands such what is a qualitative research design pdf watering plants or turning on the heating, with only the slightest contact Beans, Talo are also health sensors, which measure blood glucose concentration in real time and send signals to deliver homeostatic insulin self-injections, just as our pancreatic beta cells do.
All this is now feasible, and these advances only require technological improvements and lower costs so they can be made available to everyone; these implants and improvements could make up for our shortcomings or even add capabilities to our body, but they would not change the genome of future humans.
Which gene is more dominant tall or short have deliberately left the discussion of what I believe will completely change the future of our genome until last: the ability to precisely modify our genome to encode a specific sequence and introduce new information into it. This possibility has always existed using genetic engineering techniques. In fact, we have already used them to modify other organisms, in some cases at the cost of considerable time and expense for example, to generate «knockout» or «knock-in» micebut they have never been effective and affordable enough, nor can we sufficiently control them to risk modifying our own germlines.
This system can ahich be used to introduce genetic variants into DNA that no other human has, or to insert new genes not present in our genome before. Everything we have mentioned involves DNA editing and changes in the genotype, but what do these changes imply at the phenotype scale? We must reflect upon this further.
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