What is a significant discovery from the Human Genome Project?
The genome is composed of approximately 1,000 genes.
Human genes produce three proteins per gene, unlike other mammals which produce only one.
All humans are 99.9% identical at the DNA level.
Single gene testing will become a standardized test for all patients in the future.
The Correct Answer is C
Choice A rationale:
Incorrect. The Human Genome Project revealed that humans have approximately 20,000-25,000 genes, not 1,000. This finding significantly expanded our understanding of the complexity of the human genome.
Choice B rationale:
Incorrect. The concept of one gene producing three proteins is not a discovery from the Human Genome Project. While some genes can produce multiple protein isoforms through alternative splicing, this is not a universal feature of human genes.
Choice C rationale:
Correct. This is a major finding from the Human Genome Project. It highlights that despite our apparent differences, humans share a remarkably high degree of genetic similarity. This finding has implications for understanding human evolution, disease susceptibility, and pharmacogenomics.
Key points:
The vast majority of our DNA is shared among all humans.
The small percentage of genetic variation accounts for individual differences and diversity.
This finding challenges previous notions of race and ethnicity based on genetic differences.
It emphasizes the common origins and shared heritage of all humans.
Choice D rationale:
Incorrect. While single gene testing has become more common for certain genetic disorders, it is unlikely to become a standardized test for all patients in the future. This is due to the complexity of human genetics and the diverse factors that contribute to health and disease.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Infertility is a common issue for women with endometriosis. The endometrial tissue that grows outside the uterus can cause scarring and inflammation, which can block fallopian tubes and prevent eggs from being released or fertilized. Studies have shown that 30-50% of women with endometriosis experience infertility.
It is important to address this potential issue with the patient and discuss options for fertility preservation if desired.
Choice B rationale:
There is no evidence to suggest that women with endometriosis are more likely to have multiples. The likelihood of having multiples is primarily influenced by factors such as genetics, maternal age, and the use of fertility treatments.
Choice C rationale:
Acetaminophen may not be effective for pain relief in women with endometriosis. The pain associated with endometriosis is often severe and can be unresponsive to over-the-counter pain relievers. Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen are often more effective in managing endometriosis-related pain.
In some cases, stronger pain medications such as opioids may be necessary.
Choice D rationale:
Oral contraceptives can be helpful for women with endometriosis by:
Suppressing ovulation, which can reduce the amount of endometrial tissue that grows and bleeds each month.
Thinning the uterine lining, which can also reduce pain and bleeding.
Slowing the growth of endometrial tissue.
Oral contraceptives are not a cure for endometriosis, but they can help to manage symptoms and improve quality of life.
Correct Answer is A
Explanation
Choice A rationale:
Genotype refers to the complete set of genetic instructions an individual inherits from their parents. It represents the actual genes present within an individual's cells, determining their traits and characteristics.
Genotype is the underlying genetic foundation that shapes an individual's phenotype, which is the observable expression of those genes.
Choice B rationale:
Chromotype is not a commonly used term in genetics. It may occasionally refer to the banding pattern observed on chromosomes during certain staining techniques, but it does not accurately represent an individual's complete genetic makeup.
Choice C rationale:
Phenotype refers to the observable physical or biochemical characteristics of an individual, such as eye color, height, blood type, or susceptibility to certain diseases. It is the result of the interaction between an individual's genotype and their environment.
While phenotype is influenced by genotype, it does not directly represent the underlying genetic code itself.
Choice D rationale:
Karyotype is a visual representation of an individual's chromosomes, arranged in pairs according to size and shape. It is often used to diagnose chromosomal abnormalities or genetic disorders, but it does not provide the full details of an individual's genetic makeup at the gene level.
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