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Exam 2: Biological Beginnings

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Question 91

Multiple Choice

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In terms of teratogenic effects,X-ray radiation is an example of:

A) a prescription drug.
B) an environmental hazard.
C) a maternal disease.
D) a paternal factor.

E) None of the above
F) C) and D)

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Question 92

Multiple Choice

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The _____ provides an environment that is temperature- and humidity-controlled,as well as shockproof.

A) placental wall
B) pericardial fluid
C) umbilical cord
D) amniotic fluid

E) B) and C)
F) None of the above

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Question 93

Multiple Choice

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_____ is the field that seeks to discover the influence of heredity and environment on individual differences in human traits and development.

A cell which contains 12 pairs of chromosomes divides by mitosis to form two new cells.How many pairs of chromosomes does each new cell contain?

The period of prenatal development that occurs two to eight weeks after conception.During this time,the rate of cell differentiation intensifies,support systems for the cells form,and organs appear.

During which period of development is the unborn baby MOST at risk of developing a structural defect due to the effects of a teratogen?

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

Benny has been diagnosed with a gene-linked abnormality characterized by deceleration of mental and physical development caused by an accumulation of lipids in the nervous system.He has been put on medication and a special diet,but his family has been told that he will probably not live beyond the age of 5.Benny is suffering from:

A group of tissues in which small blood vessels from the mother and offspring intertwine but do not connect is the:

According to your text,gene-gene interactions have been documented in all of the following EXCEPT:

In human beings,by the end of meiosis,each egg or sperm has _____ chromosomes.

During _____,a cell of the testes in men or ovaries in women duplicates its chromosomes and then divides twice,thus forming four cells,each of which has only half the genetic material of the parent cell.

During fertilization,an egg and a sperm fuse to create a single cell called a:

Klinefelter syndrome affects:

_____ genes arethose that make the individual less vulnerable to certain diseases and more likely to live to an older age.

Ethel is 50 years old but appears much more aged in appearance.Most of Ethel's relatives don't live past the age of 60.Which of the following genes are responsible for the accelerated aging that is observed in Ethel and her family members?

The creation of the fertilized egg takes place in the _____ period of prenatal development.