Exam 2: Biological Beginnings

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Marly describes her friend Gina as having blonde hair,green eyes,and fair skin with freckles.Marly has described Gina's:

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C

_____,the units of hereditary information,are short segments of deoxyribonucleic acid (DNA).They direct cells to reproduce themselves and to assemble proteins.

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A

Jerome and Tyrone are fraternal twins.This means that they developed from:

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_____ correlations occur because a child's genetically influenced characteristics elicit certain types of environments.

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Tristan has a genetic disorder that results from an abnormality in the X chromosome,which becomes constricted and often breaks.His doctor informed Tristan's mother that he has:

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List five gene-linked abnormalities.

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As the benefits of evolutionary selection decrease with age,Baltes argues,the need for all of the following increases,EXCEPT:

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_____ is a complex molecule with a double helix shape,like a spiral staircase,and contains genetic information.

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_____ refers to a form of mental retardation involving an abnormally small brain.

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The current maternal blood-screening test is called the triple screen because:

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Approximately,_____ African Americans is a carrier for sickle-cell anemia.

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Rachel loves to read books,and she also encourages her daughter to read by regularly taking her to the local library and buying her lots of books.Rachel's daughter is now an avid reader.This reflects a(n)_____ correlation.

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Tamera has a genetic disorder where her red blood cells take on a hook shape instead of the normal disk shape.The doctors tell Tamera's parents that she has _____,and that this condition also provides her with a resistance to malaria.

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Which of the following is NOT a possible explanation for infertility in a woman?

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Patrick suffers from _____,a genetic abnormality in which delayed blood clotting causes internal and external bleeding.

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List the four genetic principles.In your opinion,which do you think is the most serious and why?

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Erin is 90 years old.She has relatively good health,and is fully mobile.Most of Erin's blood relatives live to a ripe,old age.Which of the following genes might be responsible for this?

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What is the behavior that promotes an organism's survival in the natural habitat?

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Shakena is a 38-year-old single woman who works as a pharmaceutical representative.She would like to adopt a child.Recent changes in adoption requirements would mean that:

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_____ introduced the theory of evolution by natural selection in 1859.

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