Chapter 2: Biological Beginnings 2.1 The Evolutionary Perspective Natural Selection & Adaptive Behavior Natural Selection: the evolutionary process by which individuals of a species that are best adapted are the ones that survive and reproduce Charles Darwin wrote On the Origins of Species explaining how those who survive are better adapted to the world than the nonsurvivors Adaptive Behavior: behavior that promotes an organism’s survival in the natural habitat Example: the attachment between
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both the mother and the fetus. Amniocentesis is a prenatal test that allows parents to gather information about [their] baby’s health and development. Amniocentesis will allow doctors to diagnose and perhaps even treat any genetic abnormalities that the test might reveal. The test is Performed by taking a sample of the mother’s amniotic fluid which is the clear‚ pale‚ yellow fluid that surrounds and protects the baby (Baby Center: "Amniocentesis"‚ 2005). The first reported
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HUMAN GROWTH AND DEVELOPMENT DEVELOPMENT Progressive series of change that occur as a result of maturation and experience. Qualitative change is the sequential and continuous process of change in any direction. Progressive Growth Changes are directional‚ leading to something positive. Quantitative change in size and structure-an increase in magnitude-in body size‚ intellectual ability or even social traits Types of Changes in Development Change in size – there is a change in physical and mental
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Teen pregnancy: Medical risks and realities Pregnant teens and their unborn babies have unique medical risks. Lack of prenatal care Teenage girls who are pregnant -- especially if they don’t have support from their parents -- are at risk of not getting adequate prenatal care. Prenatal care is critical‚ especially in the first months of pregnancy. Prenatal care screens for medical problems in both mother and baby‚ monitors the baby’s growth‚ and deals quickly with any complications that arise.
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karyotype? Answer: There are two of each chromosome in a normal karyotype because you Receive one from your mother and from your father. 2. Why are the consequences of chromosomal alterations referred to as “syndromes” and not diseases? Answer: The consequences of chromosomal alterations are referred to as syndromes and not diseases because you do not catch them and there aren’t contagious. 3. If you were asked to make a karyotype from the chromosome
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All children with the same chromosomal abnormalities will not necessarily have the same characteristics. In my family‚ the rare inherited genetic eye disorder‚ choroideremia‚ is present. My nephew was diagnosed at five years old. My mother was a carrier and now my sister is a carrier who passed the disease to her eldest of three sons. Therefore‚ if one child in a family has a chromosomal abnormality‚ their siblings are not guaranteed to have the same condition. Fortunately‚ I did not inherit the
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had the moxie to ask exactly what caused this child’s facial abnormalities.
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has the ability to detect smaller deletions and ones that may have been missed by FISH. MLPA is now becoming increasingly more accepted in the U.S (Hacıhamdioğlu et al.‚ 2015). Chromosomal microarray (CMA) can also be used to identify more atypical and smaller deletions. According to McDonald-McGinn et al. (2013)‚ Chromosomal microarray tests are the most suitable studies to be ordered to identify the
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know the risk factors involved and how to prevent birth defects. However‚ it’s also important to realize that most babies born with congenital defects are born to two healthy parents. About Birth Defects Birth defects are defined as abnormalities of structure‚
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Development of the Human Zygote November 16‚ 1995 Hundreds of thousands of times a year a single-celled zygote‚ smaller than a grain of sand‚ transforms into an amazingly complex network of cells‚ a newborn infant. Through cellular differentiation and growth‚ this process is completed with precision time and time again‚ but very rarely a mistake in the "blueprint" of growth and development does occur. Following is a description of how the pathways of this intricate web are followed and the
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