Worldwide, there are 107 boy babies born for every 100 girl babies. This skewed ratio is partly due to sex-selective abortion and "gendercide," the killing of female infants, in countries such as China and India where males are more desired. But even discounting those factors, the completely natural male-to-female sex ratio still hovers around 105:100, meaning that women are inherently more likely to give birth to boys. Why?
Several factors influence whether a sperm containing a Y sex chromosome or one containing an X chromosome will be first to fertilize an egg, including parental ages, their environmental exposure, stress, the stage in the mother's ovulation cycle and even whether she has had children previously; all these forces combine to set the average sex ratio at fertilization at 105:100.
This syndrome affects the nervous system
this syndrome is a rare disorder characterized by mental disability toward nervous type movement, caused by the absence of certain genes normally present copy of chromosomes 15 inherited from the mother
The answer is a. The arteries are red and transfer blood to the heart. Veins are blue and transfer blood away from the heart and to all of the different parts of the body. The capillaries are in-between the veins and arteries and provide blood to cells.
More than 90 percent of the weight of fat in foods and more than 95 percent of the stored fat in the human body are in the form of: triglycerides.
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What is triglycerides?</h3>
Among fats, triglycerides are one. They make up the majority of the fat in your body. They originate in food, particularly in the butter, oils, and other fats you consume. Additionally, extra calories provide triglycerides. You consume these calories, which your body does not immediately require. These extra calories are converted by your body into triglycerides and stored as fat. The triglycerides are released when your body requires energy. The triglycerides are transported to your tissues by VLDL cholesterol particles.
Your chance of developing heart conditions like coronary artery disease is increased if your triglyceride levels are high.
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The correct answer is A. Helps identify high-risk individuals before a tumor develops.
Explanation:
Tumor suppressor genes are genes in cells that if working properly prevent tumors or cancer; this occurs because these genes regulate cell division, ADN repair, and programmed cell death. On the other hand, oncogenes regulate growth in cells, but similar to tumor suppressor genes, if they mutate or do not work properly they can lead to tumors or cancer.
This implies when doctors test the presence of either mutant oncogenes or tumor suppressor genes, they can determine if the individual is predisposed to develop a tumor because if there are mutant oncogenes or abnormalities tumor suppressor genes the individual is at high-risk; although, this does not imply the individual will definitively develop cancer or tumors as this is also related to environmental factors. According to this, genetic testing of these genes helps identify high-risk individuals before a tumor develops.