BIO 100 FINAL ACTUAL EXAM | QUESTIONS AND ANSWERS |
VERIFIED ANSWERS GRADED A+ | LATEST EXAM
The visible or measurable features of an individual refers to _____. -
CORRECT ANSWER - phenotype
How many chromosomes are in a human sperm? - CORRECT ANSWER - 23
An allele that reveals itself in the phenotype only if the organism has two copies
of that allele is a _____ allele. - CORRECT ANSWER - recessive
If sickle-cell anemia is present in some of your family members, what is some
information you could obtain from reading about the research that has been
done on the condition? - CORRECT ANSWER - all of these
A person has a cystic fibrosis phenotype. What does this mean about the protein
encoded by the cystic fibrosis gene in his or her cells? - CORRECT ANSWER
- the protein is not functional
The principle that alleles of different genes are distributed independently of one
another during meiosis is _____. - CORRECT ANSWER - independent
assortment
Albinism is a genetic condition where a person lacks (melanin) pigmentation in
his or her skin, hair, and eyes. If two nonalbino people have a child who exhibits
albinism, this means albinism is most likely a _____ trait. - CORRECT
ANSWER - recessive
,Which body system has been discovered to have the most genes that influence
the severity of CF? - CORRECT ANSWER - immune system
A gene encodes a protein of 350 amino acids. A mutation creates an allele that
only has the first 120 amino acids. What could happen to this mutant allele? -
CORRECT ANSWER - all of these
A meiotic error occurred during gamete formation, resulting in an egg that has
24 chromosomes. If that egg is fertilized by a normal sperm, how many
chromosomes will be in the zygote? - CORRECT ANSWER - 47
Mexican hairless dogs are hairless because of a dominant allele of a particular
gene. Homozygous dominant dogs die in utero (before being born). What is the
probability of two hairless dogs having a hairy puppy? - CORRECT ANSWER
- 1/4
What type of trait would you assume polydactyly (extra fingers or toes) is when
every member of the family who has one dominant allele exhibits polydactyly. -
CORRECT ANSWER - dominant
Allele A has 235 codons. Allele a (an alternative allele of the same gene) has
233 codons. When comparing the protein encoded by allele A to that encoded
by allele a, protein A must be: - CORRECT ANSWER - longer by 2 amino
acids
Mexican hairless dogs are hairless because of a dominant allele of a particular
gene. Homozygous dogs die in utero (before being born). What is the
probability of one hairless dog having a hairy puppy? - CORRECT ANSWER
-0
Mexican hairless dogs are hairless because of a dominant allele of a particular
gene. Homozygous dominant dogs die in utero (before being born). What is the
,probability of two hairless dogs having a live hairless puppy? - CORRECT
ANSWER - 1/2
A healthy mother has no family history of cystic fibrosis. Her husband's brother
has cystic fibrosis. Is the mother predicted to pass the cystic fibrosis allele to her
children? - CORRECT ANSWER - no
An alien species has 102 chromosomes in its diploid somatic cells. Its haploid
gametes will have _____ chromosomes. - CORRECT ANSWER - 51
A person inherits a functional cystic fibrosis allele from both parents. This
person will have cystic fibrosis. - CORRECT ANSWER - false
A woman is heterozygous for the CF-associated gene (the alleles are
represented here by the letters A and a). Assuming that meiosis occurs normally,
which of the following represents eggs that she can produce? - CORRECT
ANSWER - either A or a
During meiosis, what happens to homologous chromosomes? - CORRECT
ANSWER - they move apart from one another
Homologous chromosomes behave differently in mitosis and meiosis. What
process do they go through in meiosis that does not occur in mitosis? -
CORRECT ANSWER - homologous chromosomes pair up with each other
In meiosis, sister chromatids separate during _____. - CORRECT ANSWER -
meiosis II
A woman has cystic fibrosis. Therefore, _____. - CORRECT ANSWER - she
must have inherited a cystic fibrosis allele from both her mother and father
, Recombination results from _____. - CORRECT ANSWER - exchange of
genes between non-sister chromatids on homologous chromosomes
What are the most likely genotypes of two parents who are not albino and who
have an albino child? - CORRECT ANSWER - Aa and Aa
Two parents are each homozygous dominant at the cystic fibrous gene. What is
the probability that their first child will have cystic fibrosis? - CORRECT
ANSWER - 0
A person with cystic fibrosis has _____ nonfunctional copies of the CFTR
protein. - CORRECT ANSWER - 2
In cystic fibrosis, which of these are affected? - CORRECT ANSWER -
airways, digestive system, and reproductive system
A parent is heterozygous for two recessive traits (trait X and trait Y). What is his
phenotype? - CORRECT ANSWER - he does not have the recessive
phenotype for either trait
An allele that can mask the presence of a recessive allele is a _____ allele. -
CORRECT ANSWER - dominant
The diagram that is used to determine the possibilities of offspring having
particular genotypes, given the genotypes of the parents, is a(n) _____. -
CORRECT ANSWER - punnett square
What is the genotype of a person with CF? - CORRECT ANSWER -
homozygous recessive
VERIFIED ANSWERS GRADED A+ | LATEST EXAM
The visible or measurable features of an individual refers to _____. -
CORRECT ANSWER - phenotype
How many chromosomes are in a human sperm? - CORRECT ANSWER - 23
An allele that reveals itself in the phenotype only if the organism has two copies
of that allele is a _____ allele. - CORRECT ANSWER - recessive
If sickle-cell anemia is present in some of your family members, what is some
information you could obtain from reading about the research that has been
done on the condition? - CORRECT ANSWER - all of these
A person has a cystic fibrosis phenotype. What does this mean about the protein
encoded by the cystic fibrosis gene in his or her cells? - CORRECT ANSWER
- the protein is not functional
The principle that alleles of different genes are distributed independently of one
another during meiosis is _____. - CORRECT ANSWER - independent
assortment
Albinism is a genetic condition where a person lacks (melanin) pigmentation in
his or her skin, hair, and eyes. If two nonalbino people have a child who exhibits
albinism, this means albinism is most likely a _____ trait. - CORRECT
ANSWER - recessive
,Which body system has been discovered to have the most genes that influence
the severity of CF? - CORRECT ANSWER - immune system
A gene encodes a protein of 350 amino acids. A mutation creates an allele that
only has the first 120 amino acids. What could happen to this mutant allele? -
CORRECT ANSWER - all of these
A meiotic error occurred during gamete formation, resulting in an egg that has
24 chromosomes. If that egg is fertilized by a normal sperm, how many
chromosomes will be in the zygote? - CORRECT ANSWER - 47
Mexican hairless dogs are hairless because of a dominant allele of a particular
gene. Homozygous dominant dogs die in utero (before being born). What is the
probability of two hairless dogs having a hairy puppy? - CORRECT ANSWER
- 1/4
What type of trait would you assume polydactyly (extra fingers or toes) is when
every member of the family who has one dominant allele exhibits polydactyly. -
CORRECT ANSWER - dominant
Allele A has 235 codons. Allele a (an alternative allele of the same gene) has
233 codons. When comparing the protein encoded by allele A to that encoded
by allele a, protein A must be: - CORRECT ANSWER - longer by 2 amino
acids
Mexican hairless dogs are hairless because of a dominant allele of a particular
gene. Homozygous dogs die in utero (before being born). What is the
probability of one hairless dog having a hairy puppy? - CORRECT ANSWER
-0
Mexican hairless dogs are hairless because of a dominant allele of a particular
gene. Homozygous dominant dogs die in utero (before being born). What is the
,probability of two hairless dogs having a live hairless puppy? - CORRECT
ANSWER - 1/2
A healthy mother has no family history of cystic fibrosis. Her husband's brother
has cystic fibrosis. Is the mother predicted to pass the cystic fibrosis allele to her
children? - CORRECT ANSWER - no
An alien species has 102 chromosomes in its diploid somatic cells. Its haploid
gametes will have _____ chromosomes. - CORRECT ANSWER - 51
A person inherits a functional cystic fibrosis allele from both parents. This
person will have cystic fibrosis. - CORRECT ANSWER - false
A woman is heterozygous for the CF-associated gene (the alleles are
represented here by the letters A and a). Assuming that meiosis occurs normally,
which of the following represents eggs that she can produce? - CORRECT
ANSWER - either A or a
During meiosis, what happens to homologous chromosomes? - CORRECT
ANSWER - they move apart from one another
Homologous chromosomes behave differently in mitosis and meiosis. What
process do they go through in meiosis that does not occur in mitosis? -
CORRECT ANSWER - homologous chromosomes pair up with each other
In meiosis, sister chromatids separate during _____. - CORRECT ANSWER -
meiosis II
A woman has cystic fibrosis. Therefore, _____. - CORRECT ANSWER - she
must have inherited a cystic fibrosis allele from both her mother and father
, Recombination results from _____. - CORRECT ANSWER - exchange of
genes between non-sister chromatids on homologous chromosomes
What are the most likely genotypes of two parents who are not albino and who
have an albino child? - CORRECT ANSWER - Aa and Aa
Two parents are each homozygous dominant at the cystic fibrous gene. What is
the probability that their first child will have cystic fibrosis? - CORRECT
ANSWER - 0
A person with cystic fibrosis has _____ nonfunctional copies of the CFTR
protein. - CORRECT ANSWER - 2
In cystic fibrosis, which of these are affected? - CORRECT ANSWER -
airways, digestive system, and reproductive system
A parent is heterozygous for two recessive traits (trait X and trait Y). What is his
phenotype? - CORRECT ANSWER - he does not have the recessive
phenotype for either trait
An allele that can mask the presence of a recessive allele is a _____ allele. -
CORRECT ANSWER - dominant
The diagram that is used to determine the possibilities of offspring having
particular genotypes, given the genotypes of the parents, is a(n) _____. -
CORRECT ANSWER - punnett square
What is the genotype of a person with CF? - CORRECT ANSWER -
homozygous recessive
