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One of the most common chromosomal abnormalities is Trisomy 21, or Down's Syndrome resulting from three copies of chromosome 21. This occurs in about one baby in 600. Characteristics of Down syndrome include rounded features, an enlarged tongue that often protrudes, and various internal disorders. Trisomy 21 occurs more frequently among babies born to women over 35 years old. The age of the father has little or no effect. What do you think are possible reasons leading to this meiotic nondisjunction in female eggs?
Which is more likely to survive in a dry enviroment?explain answer. which would be better adapted to a moist enviroment?
Red blood cell membranes are completely impermeable to sodium, potassium and chloride ions, however they are permeable to both water and urea. The concentration inside a red blood cell is 300mOsm and consists predominantly of sodium and potassium ..
The templete strand of a given gene include the sequences 3'- GCCACGTATCAG-5'. (A) What is the sequence of the non- templete strand. (B) What is the mRNA sequence made? For each one be sure to indicate 5' and 3' ends.
Explain the Kinetic Molecular Theory and describe how it helps us understand the phases of matter and behavior of gasses.
From one of the sources listed below, find a recent news article that is reporting about scientific research related to Human Biology. For example, you can find articles about scientific research on the human body, human health, or health-related ..
list and provide a brief discussion of the seven categories of toxic responses that a biological system may have. 200
Xia has been looking forward to the Elementary Science Fair for weeks. Her fourth-grade class had just finished learning about the biological cell
Based on what she knows about fats, which product most likely contains the most hydrogen atoms? Provide an explanation for this.
you are in charge of developing a new antimicrobial chemical substance that will be used to make food grade cutting
What is the source of the bacterial colonies in the heated samples?
Where are the water molecules being produced for the equation given above?
During heavy exercise, Jamal's cardiac output increased to asmuch as 35 L/min. If his stroke volume could not increase above the normal of 70 ml, what heart rate would be necessary to achieve this cardiac output? Is this heart ratephysiologically ..
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