BIOS 100 QUESTIONS
1. Which of the following describes a genetic mutation: a change in the sequence of DNA
nucleotides
2. An altered form of a gene that causes cancer is called a/an
gene.: mutant
3. Oncogenes are often the product of which of the following?: the occurrenceof inversion
mutations where genes are inactivated
4. Which of the following are most likely to keep tumors from forming: tu-mor-suppressor
genes
5. Fully functioning tumor-suppressor genes do which of the following: stoptumor
formation by suppressing cell division
6. Which of the following is by far the leading cause of cancer death amongmen and
women?: breast in women; prostate in men
7. Tobacco use accounts for nearly cancer deaths: 1 in 3
8. Women who smoke are about times more likely to develop lung
cancer than women who don't smoke.: 26
9. Women who inherit a mutated form of BRCA1 or BRCA2 genes are times more
likely to develop breast cancer that a woman who does not have such a mutation.: 5
10. Which type of cancer is the most common among individuals ages 25-29?-
: skin (melanomas)
11. What percentage of North American women can expect to get breastcancer in their
lifetime: 12
12. Which of the following best describes what BRCA1 and BRCA2 are: tumorsuppressor
genes
13. The five year survival rate of women who are diagnosed for breast canceris about %.:
90
14. Which of the following is a factor that increases a woman's chance ofgetting breast
cancer?: the less time she spends nursing her children
15. Which of the following represent a way that may serve to reduce your chance of
developing cancer?: eat a variety of vegetables, fruits, whole grainsand legumes regularly
16. The process of meiosis produces what type of cells: haploid gametes
17. Meiosis differs from mitosis in which of the following ways?: meiosis, through crossing
over and independent assortment, leads to the production of genetically different haploid cells
(gametes)
, 18. When Gregor Mendel did his experiments with inherited characters in peas, he was lucky
to have chosen characters that were controlled by singlegenes. These characters (i.e., purple vs
white flowers, yellow vs green peas)are called characters.: epistatic
19. Which of the following is the reason why this disease is so relatively common among
Afro-Americans?: people who are heterozygous for the allelethat produces Sickle Cell are
resistant to malaria
20. That many characteristics of humans are continuous in nature (show a wide range of
continuous variation) is due to which of the following?: ) the factthat a single gene can produce
effects across a wide range of characteristics
21. The proportion of variation within a population due to genetic differencesamong
individuals is called .: heritability
22. When homozygous dominant individuals (RR) produce red flowersand homozygous
recessive individual (rr) produce white flowers, but heterozygous individuals produce pink
flowers, this is an example of
.: incomplete dominance
23. A person with which blood type can receive blood from donors with anyblood type: Type
AB
24. When a single gene has the potential to cause multiple effectson an individual's
phenotype the effects of this gene are due to
: pleiotropy
25. In the case of an X-linked trait such as muscular dystrophy, what are thechances that a
daughter born of a mother who is a carrier for the disease and a father without the disease
being afflicted with (i.e., showing physical symptoms of) muscular dystrophy?: no chance
26. What is the chance of a daughter born of the above parents (mom is acarrier; dad is
unafflicted) being a carrier herself?: 50
27. Huntingtion's disease is a dominant human genetic disease generally considered to be
incurable, always fatal. What percentage of offspring froma mating between a man
heterozygous for this condition and a woman ho- mozygous recessive (normal) for this
condition would be expected to showsymptoms of this disease by middle age?: half
28. When two alleles are expressed in a particular genotypes, such as the ABblood type, this
is an example of which of the following?: codominance
29. Which of the following genotypes of a red blood cell will code for B typeblood group?: a)
IBi b) IAIB c) IBIB d) IAi e) a & c
30. A young man purports to be the long-lost son of a very wealthy older man who has recently
died leaving a large unclaimed fortune. The man was AB type and his wife of many years was B
blood type. The young man who claimed to be the man's son was O blood type. Was the young
man the son of the wealthy man?: no, there is no way the young man could be the wealthy
1. Which of the following describes a genetic mutation: a change in the sequence of DNA
nucleotides
2. An altered form of a gene that causes cancer is called a/an
gene.: mutant
3. Oncogenes are often the product of which of the following?: the occurrenceof inversion
mutations where genes are inactivated
4. Which of the following are most likely to keep tumors from forming: tu-mor-suppressor
genes
5. Fully functioning tumor-suppressor genes do which of the following: stoptumor
formation by suppressing cell division
6. Which of the following is by far the leading cause of cancer death amongmen and
women?: breast in women; prostate in men
7. Tobacco use accounts for nearly cancer deaths: 1 in 3
8. Women who smoke are about times more likely to develop lung
cancer than women who don't smoke.: 26
9. Women who inherit a mutated form of BRCA1 or BRCA2 genes are times more
likely to develop breast cancer that a woman who does not have such a mutation.: 5
10. Which type of cancer is the most common among individuals ages 25-29?-
: skin (melanomas)
11. What percentage of North American women can expect to get breastcancer in their
lifetime: 12
12. Which of the following best describes what BRCA1 and BRCA2 are: tumorsuppressor
genes
13. The five year survival rate of women who are diagnosed for breast canceris about %.:
90
14. Which of the following is a factor that increases a woman's chance ofgetting breast
cancer?: the less time she spends nursing her children
15. Which of the following represent a way that may serve to reduce your chance of
developing cancer?: eat a variety of vegetables, fruits, whole grainsand legumes regularly
16. The process of meiosis produces what type of cells: haploid gametes
17. Meiosis differs from mitosis in which of the following ways?: meiosis, through crossing
over and independent assortment, leads to the production of genetically different haploid cells
(gametes)
, 18. When Gregor Mendel did his experiments with inherited characters in peas, he was lucky
to have chosen characters that were controlled by singlegenes. These characters (i.e., purple vs
white flowers, yellow vs green peas)are called characters.: epistatic
19. Which of the following is the reason why this disease is so relatively common among
Afro-Americans?: people who are heterozygous for the allelethat produces Sickle Cell are
resistant to malaria
20. That many characteristics of humans are continuous in nature (show a wide range of
continuous variation) is due to which of the following?: ) the factthat a single gene can produce
effects across a wide range of characteristics
21. The proportion of variation within a population due to genetic differencesamong
individuals is called .: heritability
22. When homozygous dominant individuals (RR) produce red flowersand homozygous
recessive individual (rr) produce white flowers, but heterozygous individuals produce pink
flowers, this is an example of
.: incomplete dominance
23. A person with which blood type can receive blood from donors with anyblood type: Type
AB
24. When a single gene has the potential to cause multiple effectson an individual's
phenotype the effects of this gene are due to
: pleiotropy
25. In the case of an X-linked trait such as muscular dystrophy, what are thechances that a
daughter born of a mother who is a carrier for the disease and a father without the disease
being afflicted with (i.e., showing physical symptoms of) muscular dystrophy?: no chance
26. What is the chance of a daughter born of the above parents (mom is acarrier; dad is
unafflicted) being a carrier herself?: 50
27. Huntingtion's disease is a dominant human genetic disease generally considered to be
incurable, always fatal. What percentage of offspring froma mating between a man
heterozygous for this condition and a woman ho- mozygous recessive (normal) for this
condition would be expected to showsymptoms of this disease by middle age?: half
28. When two alleles are expressed in a particular genotypes, such as the ABblood type, this
is an example of which of the following?: codominance
29. Which of the following genotypes of a red blood cell will code for B typeblood group?: a)
IBi b) IAIB c) IBIB d) IAi e) a & c
30. A young man purports to be the long-lost son of a very wealthy older man who has recently
died leaving a large unclaimed fortune. The man was AB type and his wife of many years was B
blood type. The young man who claimed to be the man's son was O blood type. Was the young
man the son of the wealthy man?: no, there is no way the young man could be the wealthy
