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Ψ Note: These questions are part of a larger data base of questions on Chapter 3 & are selected to represent the type of question you should expect on unit exam one. You can, in fact, expect to see many of these very same questions on that exam. Exam questions, however, may deal with topics not covered in the self tests or in lectures but are discussed in your textbook. You are responsible for the content of your text book plus the content of lectures, interactive activities, & material on the web site. Use these sample questions to test yourself & to practice for the test. Click on your choice to see if you are right.
3. The determining factor in a zygote's sex is
4. Monozygotic twins
5. Genes are segments of molecules of:
6. The dominant-recessive pattern is
7. Most of the known genetic traits are:
8. Boys can inherit an X-linked trait from their
9. Which of the following is a predisposing factor for schizophrenia?
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Practice Test for
10. Trisomy - 21 is called
• fragile-X syndrome.
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11. A karyotype
shows a chromosomal portrait.
is a persons demonstrated traits.
consists of all the influencing genes for hearing.
is a chart of the family history.
12. The sum total of all the genes a person inherits is called
an additive pattern.
a dominant pattern.
the genotype.
the phenotype.
13. Suppose a particular couple has a 50/50 chance of having a child with abnormalities. Who makes the decision about having the baby?
the doctor
the genetic counselor
the couple
the government through the courts
14. The expression of shyness depends on
genetics.
cultural factors
parental example
all of the above
15. In the male, the 23rd pair of chromosomes is designated ____ ; in the female its designated ____.
16. When a zygote splits, the two identical, independent clusters that develop become;
dizygotic twins.
farernal twins.
trizygotic twins
monozygotic twins.
17. Genotype is to phenotype as ________ is to ________.
genetic potential; physical expression
physical expression; genetic potential
gamete; zygote
sperm; ovum
18. The genes that influence height & skin color interact according to the ______ pattern.
additive
X–linked
nonadditive
dominant-recessive
19. If a man carries the recessive gene for cystic fibrosis & his wife does not, the chances of their offspring having cystic fibrosis is;
zero.
one in four.
fifty-fifty.
dependent on the wife’s ethic background.
20. The effect of a gene on a particular physical characteristic is dependant on whether the gene comes from the mother or the father. This effect is called
• the dominant recessive pattern.
• the additive pattern.
• molecular genetics.
• imprinting.
21. Type of genetic test administered to all newborns in the US?
• CVS
• PKU
• Amniocentesis
• Alpha-Fetoprotein Assay
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Lifespan Growth & Development Robert C. Gates 
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How bold one gets when one is sure of being loved! - Sigmund Freud |