BSC 108 TEST 3 QUESTIONS WITH 100% CORRECT SOLUTIONS | GUARANTEED SUCCESS.
Assume you were studying two characteristics of peas, and when you crossed heterozygous F1
individuals you did not see the 9:3:3:1 ratio predicted for a dihybrid cross. You later found that these
two characteristics were on the same chromosome. With this information, how would you explain the
results? - (answer)the genes are linked and are inherited together
Before a cell divides, it copies all of its chromosomes. While the two copies of a chromosome are
attached they are called ____________. - (answer)sister chromatids
Chromosomes contain most of the cell's ___________ which acts as the molecule of heredity. -
(answer)DNA
DNA and protein together form a complex called _____________. - (answer)chromatin
The DNA of every eukaryotic cell is stored in one or more _____________ located in the ___________. -
(answer)chromosomes
nucleus
A duplicated chromosome remains tightly paired with its partner at a region called the
________________. - (answer)centromere
Surprising new evidence has shown that, in some cases, environmental factors can modify
chromosomes in such a way that changes the expression of genes without changing genes themselves or
any part of the DNA sequence. These modifications are called epigenetic effects. Epigenetic effects can
sometimes even be passed from generation to generation. In what way would this kind of "inheritance"
be an exception to Mendel's laws? - (answer)according to Mendel's laws, the effects of our environment
are not passed on to the next generation
What are the genotypes for blood group A? - (answer)I^A I^A
or
,BSC 108 TEST 3 QUESTIONS WITH 100% CORRECT SOLUTIONS | GUARANTEED SUCCESS.
I^A i
What are the genotypes for blood group B? - (answer)I^B I^B
or
I^B i
What are the genotypes for blood group AB? - (answer)I^A I^B
What are the genotypes for blood group O? - (answer)ii
Tay Sachs disease runs in Rebecca's family. When she looked at her family pedigree, she saw a shaded
circle. This represented __________. - (answer)a female with Tay Sachs
The most common phenotype in a natural population is referred to as the __________. - (answer)wild
type
In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the
genotype of an individual who is heterozygous for dimples? (use D as the genotypes) - (answer)Dd
The H allele specifies a cell-surface receptor protein that liver cells use to mop up excess "bad
cholesterol" from the blood. Each receptor protein type only accepts specific molecule shapes. With
only half as many receptors on their liver cell membranes as HH individuals, heterozygotes can remove
much less excess cholesterol. _______________ - (answer)relationship of structure to function
Over thousands of years, genetic tinkering has led to the incredible variety of body types and behaviors
we have today, from huge, docile Great Danes to tiny, spunky Chihuahuas. ________________ -
(answer)evolution
, BSC 108 TEST 3 QUESTIONS WITH 100% CORRECT SOLUTIONS | GUARANTEED SUCCESS.
The clogging of blood vessels causes a cascade of symptoms; blood flow to body parts is reduced,
resulting in periodic fever, severe pain, and damage to the heart, brain, and kidneys. The abnormal cells
are destroyed by the body, causing anemia and general weakness. ____________________ -
(answer)interactions within biological systems
Mendel crossed homozygous plants having round-yellow seeds with plants having wrinkled-green seeds.
The union of gametes from the parental generation yielded hybrids heterozygous for both characters.
All of these offspring had round-yellow seeds. ________________ - (answer)information flow
Crossing a plant with white flowers and a plant that is homozygous for purple flowers results in offspring
with what color combinations? (white is the recessive trait) - (answer)all flowers will be purple
Can two plants with purple flowers produce offspring with white flowers? - (answer)yes, if both parents
are heterozygous for the trait
A true-breeding plant that produces yellow seeds is crossed with a true-breeding plant that produces
green seeds. The seeds of all of the offspring are yellow. Why? - (answer)the yellow allele is dominant to
the green allele
You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon.
All of the F1 are pink. What can you say about the alleles for the parental traits? - (answer)red and white
show incomplete dominance
Chromosomes that are not sex chromosomes are called ______. - (answer)autosomes
Linked genes are genes that __________. - (answer)are on the same chromosome
Flower color in snapdragons is an example of incomplete dominance. If a red-flowered plant is crossed
with a white-flowered plant, the F1 generation has pink flowers. If a pink-flowered plant is crossed with
a pink-flowered plant, the progeny plants will be __________. - (answer)25% red, 50% pink, and 25%
white
Assume you were studying two characteristics of peas, and when you crossed heterozygous F1
individuals you did not see the 9:3:3:1 ratio predicted for a dihybrid cross. You later found that these
two characteristics were on the same chromosome. With this information, how would you explain the
results? - (answer)the genes are linked and are inherited together
Before a cell divides, it copies all of its chromosomes. While the two copies of a chromosome are
attached they are called ____________. - (answer)sister chromatids
Chromosomes contain most of the cell's ___________ which acts as the molecule of heredity. -
(answer)DNA
DNA and protein together form a complex called _____________. - (answer)chromatin
The DNA of every eukaryotic cell is stored in one or more _____________ located in the ___________. -
(answer)chromosomes
nucleus
A duplicated chromosome remains tightly paired with its partner at a region called the
________________. - (answer)centromere
Surprising new evidence has shown that, in some cases, environmental factors can modify
chromosomes in such a way that changes the expression of genes without changing genes themselves or
any part of the DNA sequence. These modifications are called epigenetic effects. Epigenetic effects can
sometimes even be passed from generation to generation. In what way would this kind of "inheritance"
be an exception to Mendel's laws? - (answer)according to Mendel's laws, the effects of our environment
are not passed on to the next generation
What are the genotypes for blood group A? - (answer)I^A I^A
or
,BSC 108 TEST 3 QUESTIONS WITH 100% CORRECT SOLUTIONS | GUARANTEED SUCCESS.
I^A i
What are the genotypes for blood group B? - (answer)I^B I^B
or
I^B i
What are the genotypes for blood group AB? - (answer)I^A I^B
What are the genotypes for blood group O? - (answer)ii
Tay Sachs disease runs in Rebecca's family. When she looked at her family pedigree, she saw a shaded
circle. This represented __________. - (answer)a female with Tay Sachs
The most common phenotype in a natural population is referred to as the __________. - (answer)wild
type
In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the
genotype of an individual who is heterozygous for dimples? (use D as the genotypes) - (answer)Dd
The H allele specifies a cell-surface receptor protein that liver cells use to mop up excess "bad
cholesterol" from the blood. Each receptor protein type only accepts specific molecule shapes. With
only half as many receptors on their liver cell membranes as HH individuals, heterozygotes can remove
much less excess cholesterol. _______________ - (answer)relationship of structure to function
Over thousands of years, genetic tinkering has led to the incredible variety of body types and behaviors
we have today, from huge, docile Great Danes to tiny, spunky Chihuahuas. ________________ -
(answer)evolution
, BSC 108 TEST 3 QUESTIONS WITH 100% CORRECT SOLUTIONS | GUARANTEED SUCCESS.
The clogging of blood vessels causes a cascade of symptoms; blood flow to body parts is reduced,
resulting in periodic fever, severe pain, and damage to the heart, brain, and kidneys. The abnormal cells
are destroyed by the body, causing anemia and general weakness. ____________________ -
(answer)interactions within biological systems
Mendel crossed homozygous plants having round-yellow seeds with plants having wrinkled-green seeds.
The union of gametes from the parental generation yielded hybrids heterozygous for both characters.
All of these offspring had round-yellow seeds. ________________ - (answer)information flow
Crossing a plant with white flowers and a plant that is homozygous for purple flowers results in offspring
with what color combinations? (white is the recessive trait) - (answer)all flowers will be purple
Can two plants with purple flowers produce offspring with white flowers? - (answer)yes, if both parents
are heterozygous for the trait
A true-breeding plant that produces yellow seeds is crossed with a true-breeding plant that produces
green seeds. The seeds of all of the offspring are yellow. Why? - (answer)the yellow allele is dominant to
the green allele
You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon.
All of the F1 are pink. What can you say about the alleles for the parental traits? - (answer)red and white
show incomplete dominance
Chromosomes that are not sex chromosomes are called ______. - (answer)autosomes
Linked genes are genes that __________. - (answer)are on the same chromosome
Flower color in snapdragons is an example of incomplete dominance. If a red-flowered plant is crossed
with a white-flowered plant, the F1 generation has pink flowers. If a pink-flowered plant is crossed with
a pink-flowered plant, the progeny plants will be __________. - (answer)25% red, 50% pink, and 25%
white
