Genetics Test #1 UPDATED Exam
Questions and CORRECT Answers
All of the answers are possibilities - CORRECT ANSWER - At the molecular level, which
of the following best explain heterozygous advantage and overdominance?
A heterozygous individual can produce more varieties of homdimer proteins
The alleles produce two different proteins with slightly different functions
The proteins produced by the alleles may provide a broader range of environmental tolerance,
such as temperature ranges
Infectious organisms may recognize only a specific functional protein
All of the answers are probabilities
Full coat color - CORRECT ANSWER - In rabbits, full coat color (c) is the dominant trait.
A second allele, chinchilla (c^ch) is recessive to full coat color. Himalayan coat color (c^h) is
recessive to chinchilla and full coat colors, and albino (c) is recessive to all coat colors. If two
chinchilla rabbits mate, what coat color is not possible in their offspring?
Product rule - CORRECT ANSWER - Which of the following would be used to determine
the probability of three independent events in order?
meiosis; egg cells - CORRECT ANSWER - Oogenesis is a gametogenic process involving
____ that produces _____.
gene interaction - CORRECT ANSWER - If a combination of two or more genes is
required to produce a specific trait, it is called a(n) ________.
,White flowers (Enzyme A) ——-> White flowers (Enzyme B) ——-> Purple flowers (Question
6) - CORRECT ANSWER - Two white-flowered true-breeding plants with genotypes
AAbb and aaBB are crossed. All of the F1 are AABb and have purple flowers. Select the
molecular pathway that will result in purple flowers in the F1.
an environmentally-influenced trait - CORRECT ANSWER - Phenylketonuria in humans
is an example of ________.
Genetic information is contained within a nucleoid region.
Genetic material is organized as a single circular chromosome.
A cell wall surrounds the plasma membrane. - CORRECT ANSWER - Which of the
following statements is correct regarding prokaryotic cells? Check all that apply.
Genetic information is contained within a nucleoid region.
Genetic material is organized as a single circular chromosome.
Membrane-bound organelles are found in the cytoplasm.
A cell wall surrounds the plasma membrane.
walnut= R_P_, single = rrpp, rose = R_pp, pea = rrP_ (Question 9) - CORRECT
ANSWER - You cross a rose comb chicken with a pea comb chicken and get all walnut
comb progeny. You then cross two of the walnut combed chickens from the F1 generation and
get 9 walnut combs: 3 rose combs: 3 pea combs: 1 single comb.
Which of the following would best explain these results? Underline means any allele could be
present; e.g. R_ could be RR or Rr.
, They always result in a 9:7 ratio of a dihybrid cross. - CORRECT ANSWER - Which of
the following is not correct concerning epistatic interactions?
Molecular genetics - CORRECT ANSWER - Which of the following level of genetics
studies the effects of loss-of-function mutations?
Only 70% of the individuals who carry the allele(s) for a trait express the trait. - CORRECT
ANSWER - If a geneticist describes a trait as being 70% penetrant, what would they
mean?
Pangenesis - CORRECT ANSWER - _________ is the belief that seeds are produced by
all parts of the body and transmitted to the next generation.
The chromosomes line up along the center of the cell. - CORRECT ANSWER - Which of
the following events would be the next to occur upon conclusion of prometaphase?
conditional lethal alleles - CORRECT ANSWER - Temperature-sensitive alleles that kill
an organism only in a particular temperature range are examples of _________.
True - CORRECT ANSWER - Differences in plant flower color or plant height are called
a variant of a trait.
a protein that controls the formation of the carbohydrate - CORRECT ANSWER - The
blood types of the ABO typing system are inheritable even though they result from different
forms of a carbohydrate on the cell surface. The explanation for why this is an inheritable trait is
_____________.
monohybrid cross - CORRECT ANSWER - A cross in which a researcher investigates the
patterns of inheritance of a single trait is called a ____________.
Questions and CORRECT Answers
All of the answers are possibilities - CORRECT ANSWER - At the molecular level, which
of the following best explain heterozygous advantage and overdominance?
A heterozygous individual can produce more varieties of homdimer proteins
The alleles produce two different proteins with slightly different functions
The proteins produced by the alleles may provide a broader range of environmental tolerance,
such as temperature ranges
Infectious organisms may recognize only a specific functional protein
All of the answers are probabilities
Full coat color - CORRECT ANSWER - In rabbits, full coat color (c) is the dominant trait.
A second allele, chinchilla (c^ch) is recessive to full coat color. Himalayan coat color (c^h) is
recessive to chinchilla and full coat colors, and albino (c) is recessive to all coat colors. If two
chinchilla rabbits mate, what coat color is not possible in their offspring?
Product rule - CORRECT ANSWER - Which of the following would be used to determine
the probability of three independent events in order?
meiosis; egg cells - CORRECT ANSWER - Oogenesis is a gametogenic process involving
____ that produces _____.
gene interaction - CORRECT ANSWER - If a combination of two or more genes is
required to produce a specific trait, it is called a(n) ________.
,White flowers (Enzyme A) ——-> White flowers (Enzyme B) ——-> Purple flowers (Question
6) - CORRECT ANSWER - Two white-flowered true-breeding plants with genotypes
AAbb and aaBB are crossed. All of the F1 are AABb and have purple flowers. Select the
molecular pathway that will result in purple flowers in the F1.
an environmentally-influenced trait - CORRECT ANSWER - Phenylketonuria in humans
is an example of ________.
Genetic information is contained within a nucleoid region.
Genetic material is organized as a single circular chromosome.
A cell wall surrounds the plasma membrane. - CORRECT ANSWER - Which of the
following statements is correct regarding prokaryotic cells? Check all that apply.
Genetic information is contained within a nucleoid region.
Genetic material is organized as a single circular chromosome.
Membrane-bound organelles are found in the cytoplasm.
A cell wall surrounds the plasma membrane.
walnut= R_P_, single = rrpp, rose = R_pp, pea = rrP_ (Question 9) - CORRECT
ANSWER - You cross a rose comb chicken with a pea comb chicken and get all walnut
comb progeny. You then cross two of the walnut combed chickens from the F1 generation and
get 9 walnut combs: 3 rose combs: 3 pea combs: 1 single comb.
Which of the following would best explain these results? Underline means any allele could be
present; e.g. R_ could be RR or Rr.
, They always result in a 9:7 ratio of a dihybrid cross. - CORRECT ANSWER - Which of
the following is not correct concerning epistatic interactions?
Molecular genetics - CORRECT ANSWER - Which of the following level of genetics
studies the effects of loss-of-function mutations?
Only 70% of the individuals who carry the allele(s) for a trait express the trait. - CORRECT
ANSWER - If a geneticist describes a trait as being 70% penetrant, what would they
mean?
Pangenesis - CORRECT ANSWER - _________ is the belief that seeds are produced by
all parts of the body and transmitted to the next generation.
The chromosomes line up along the center of the cell. - CORRECT ANSWER - Which of
the following events would be the next to occur upon conclusion of prometaphase?
conditional lethal alleles - CORRECT ANSWER - Temperature-sensitive alleles that kill
an organism only in a particular temperature range are examples of _________.
True - CORRECT ANSWER - Differences in plant flower color or plant height are called
a variant of a trait.
a protein that controls the formation of the carbohydrate - CORRECT ANSWER - The
blood types of the ABO typing system are inheritable even though they result from different
forms of a carbohydrate on the cell surface. The explanation for why this is an inheritable trait is
_____________.
monohybrid cross - CORRECT ANSWER - A cross in which a researcher investigates the
patterns of inheritance of a single trait is called a ____________.
