BIO 100: Exam 2 questions and
answers rated A+
Alternate forms of a gene are called ___. - correct answer ✔✔ alleles.
Describing a person as having hemophilia is to indicate his/her ___. - correct answer ✔✔
phenotype.
Why do your chromosomes come in pairs? - correct answer ✔✔ Because one member of each
pair came from my mother and the other from my father.
How did Mendel get the peas to cross-fertilize? - correct answer ✔✔ He kept them apart and
pollinated them by hand.
The observable traits expressed by an organism are described as its ___. - correct answer ✔✔
phenotype.
Half of the gametes produced by an organism with the genotype Aa will receive the A allele,
while half will receive the a allele. This is a demonstration of ______. - correct answer ✔✔
segregation.
Which of the following is true about genes that are located on different chromosomes? - correct
answer ✔✔ These genes are inherited independently of each other.
A recessive trait will be observed in individuals that are ________ for that trait. - correct answer
✔✔ homozygous
,What are the types of gametes that can be produced by an individual with the genotype AaBb?
- correct answer ✔✔ AB, Ab, aB, ab
If mom's genotype is Bb, her eggs will be ______. - correct answer ✔✔ half B and half b
You have flipped a standard quarter 10 times and had four head and six tails come up. With that
experience, what will be the chances of you getting a heads on the next flip? - correct answer
✔✔ 50%
When a population has a gene with two alleles circulating, how many possible genotypes are
there? - correct answer ✔✔ 3
What is the probability of having four girls in a row? - correct answer ✔✔ 1/8
What is the probability that the following pair of parents will produce the indicated offspring
(assuming independent assortment)? AABb x AaBb->AAbb - correct answer ✔✔ 1/8
Mendel imagined that seed color in pea plants is influenced by a pair of genes in which the gene
for yellow seeds (Y) is dominant over the gene for green seeds (y). What would Mendel predict
the seed colors would be from a cross of a male plant with the mixed Yy genotype with a female
plant with the yy genotype? - correct answer ✔✔ There should be one green for every one
yellow seed.
In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what
is the expected outcome? - correct answer ✔✔ All offspring with red eyes.
Hemophilia has an X-linked recessive pattern. It is carried on the "X" chromosome. It is only
expressed phenotypically as homozygous recessive in women but men that inherit the affected
chromosome will suffer from the disorder. A carrier woman (one affected X chromosome)
married a man with hemophilia, and they have children. What percent of their boy children will
be affected with hemophilia? - correct answer ✔✔ 50% of the boy children
, Why are all the eggs in humans X and never Y? - correct answer ✔✔ Human females only have
X genes to put into their eggs.
What would a female genotype have to be for her to have the genetic disease hemophilia? -
correct answer ✔✔ Both her X chromosomes would have to have the recessive hemophilia
gene.
In a cross between a white-eyed female fruit fly and a red-eyed male fruit fly, what is the
expected outcome? - correct answer ✔✔ All offspring with red eyes.
Your chromosomes are located _______ and they are made of ___________ . - correct answer
✔✔ inside the nucleus, DNA
A nucleotide is made of _______. - correct answer ✔✔ Sugar + phosphate + nitrogen base
A molecule of RNA (ribonucleic acid) contains the bases _______. - correct answer ✔✔ adenine,
guanine, cytosine, and uracil
Which of the following does cytosine pair with? - correct answer ✔✔ Guanine
Prokaryotes contain a _________ chromosome, and eukaryotes contain ________
chromosomes. - correct answer ✔✔ single-stranded circular; single-stranded linear
chromosomes.
DNA replicates by which of the following models? - correct answer ✔✔ Semiconservative.
During replication the DNA helix is maintained, but ________________ . - correct answer ✔✔
the individual base pairs are "unzipped" by a specific enzyme.
answers rated A+
Alternate forms of a gene are called ___. - correct answer ✔✔ alleles.
Describing a person as having hemophilia is to indicate his/her ___. - correct answer ✔✔
phenotype.
Why do your chromosomes come in pairs? - correct answer ✔✔ Because one member of each
pair came from my mother and the other from my father.
How did Mendel get the peas to cross-fertilize? - correct answer ✔✔ He kept them apart and
pollinated them by hand.
The observable traits expressed by an organism are described as its ___. - correct answer ✔✔
phenotype.
Half of the gametes produced by an organism with the genotype Aa will receive the A allele,
while half will receive the a allele. This is a demonstration of ______. - correct answer ✔✔
segregation.
Which of the following is true about genes that are located on different chromosomes? - correct
answer ✔✔ These genes are inherited independently of each other.
A recessive trait will be observed in individuals that are ________ for that trait. - correct answer
✔✔ homozygous
,What are the types of gametes that can be produced by an individual with the genotype AaBb?
- correct answer ✔✔ AB, Ab, aB, ab
If mom's genotype is Bb, her eggs will be ______. - correct answer ✔✔ half B and half b
You have flipped a standard quarter 10 times and had four head and six tails come up. With that
experience, what will be the chances of you getting a heads on the next flip? - correct answer
✔✔ 50%
When a population has a gene with two alleles circulating, how many possible genotypes are
there? - correct answer ✔✔ 3
What is the probability of having four girls in a row? - correct answer ✔✔ 1/8
What is the probability that the following pair of parents will produce the indicated offspring
(assuming independent assortment)? AABb x AaBb->AAbb - correct answer ✔✔ 1/8
Mendel imagined that seed color in pea plants is influenced by a pair of genes in which the gene
for yellow seeds (Y) is dominant over the gene for green seeds (y). What would Mendel predict
the seed colors would be from a cross of a male plant with the mixed Yy genotype with a female
plant with the yy genotype? - correct answer ✔✔ There should be one green for every one
yellow seed.
In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what
is the expected outcome? - correct answer ✔✔ All offspring with red eyes.
Hemophilia has an X-linked recessive pattern. It is carried on the "X" chromosome. It is only
expressed phenotypically as homozygous recessive in women but men that inherit the affected
chromosome will suffer from the disorder. A carrier woman (one affected X chromosome)
married a man with hemophilia, and they have children. What percent of their boy children will
be affected with hemophilia? - correct answer ✔✔ 50% of the boy children
, Why are all the eggs in humans X and never Y? - correct answer ✔✔ Human females only have
X genes to put into their eggs.
What would a female genotype have to be for her to have the genetic disease hemophilia? -
correct answer ✔✔ Both her X chromosomes would have to have the recessive hemophilia
gene.
In a cross between a white-eyed female fruit fly and a red-eyed male fruit fly, what is the
expected outcome? - correct answer ✔✔ All offspring with red eyes.
Your chromosomes are located _______ and they are made of ___________ . - correct answer
✔✔ inside the nucleus, DNA
A nucleotide is made of _______. - correct answer ✔✔ Sugar + phosphate + nitrogen base
A molecule of RNA (ribonucleic acid) contains the bases _______. - correct answer ✔✔ adenine,
guanine, cytosine, and uracil
Which of the following does cytosine pair with? - correct answer ✔✔ Guanine
Prokaryotes contain a _________ chromosome, and eukaryotes contain ________
chromosomes. - correct answer ✔✔ single-stranded circular; single-stranded linear
chromosomes.
DNA replicates by which of the following models? - correct answer ✔✔ Semiconservative.
During replication the DNA helix is maintained, but ________________ . - correct answer ✔✔
the individual base pairs are "unzipped" by a specific enzyme.
