____ are the units of heredity.
Variants of genes are called ____ and arise by a process called ____.
A variant in sequence that is present in at least 1% of a population is called a (an)
Which of the following is not a potential use for results of DNA microarray testing?
|A)||determining the probability that your offspring will carry the gene for a particular trait|
|B)||determining which genes are active in cells affected with cancer|
|C)||determining whether a particular drug will be toxic for you|
|D)||All of the above are potential uses of DNA microarray testing.|
Which of the following statements is true regarding genomes?
|A)||Humans and chimpanzees share about 50% of their DNA sequences.|
|B)||Two members of different races may have more genes in common than two members of the same race.|
|C)||The more different DNA sequences of two species are to one another, the more recently two species diverged from a single ancestor.|
|D)||All of the above are true regarding genomes.|
The alleles in a population constitute the
The probability that a child in a particular family will inherit a recessive disorder is 1/4. If the parents have three normal children, what is the probability that their fourth child will inherit the disorder?
A gene may have many alleles, but each individual has only two alleles because
|A)||having more than two alleles is lethal.|
|B)||having more than two alleles unbalances the chromosomes.|
|C)||a person has two parents who each contribute one allele.|
|D)||a backup set of alleles is necessary in case something goes wrong.|
The ____ refers to the allele combinations for particular genes while ____ is the expression of that allele combination.
Linda and Ben request prenatal genetic testing to determine if their unborn child has Down syndrome. Cells are collected from the fetus and the chromosomes are examined in a ____ analysis.
Which of the following genetic disorders is not thought to be Mendelian?
Julie is at risk for developing a genetic disorder. Her absolute risk of developing the disease over her lifetime is 4 in 10. The risk to the general population is 16 in 100. Calculate Julie's relative risk and advise her accordingly.
|A)||her relative risk is less than 1: her chance if developing the illness is less than that of the general population|
|B)||her relative risk indicates a greater-than-2-fold risk compared to an individual in the general population|
|C)||her relative risk indicates that she is as likely to develop the illness as an individual from the general population|
|D)||no inferences can be made given the information in question 12|
How do genetic diseases differ from other diseases?
|A)||recurrence risk is predictabl|
|B)||presymptomatic testing is possible|
|C)||different populations have different characteristic frequencies|
|D)||all of the above|
A transgenic organism has
|A)||genes, other organisms do not.|
|B)||genes from different species.|
|C)||a dominant phenotype.|
|D)||had its genome sequenced.|
The technique of ____ attempts to correct certain genetic disorders.
A 54-year-old man and his 26-year-old son are each accused of committing a rape. Why would DNA fingerprinting be difficult in evaluating this case?
|A)||DNA typing requires samples from relatives to compare to the crime scene sample|
|B)||father and son are likely to have the same alleles for sequences examined|
|C)||we cannot be certain that father and son are biologically related so comparisons are not possible|
|D)||none of the above|
A human female has ____ pairs of autosomes and the sex chromosome complement of
Wearing contact lenses that change the color of the eyes changes the
|C)||both a and b.|
|D)||neither a nor b.|
Which of the following is the genetic material?
|D)||it has not been identified|
Geneticist Hermann J. Muller wrote "In a sense we contain ourselves, wrapped up within ourselves, trillions of times repeated." To what does this quote refer?