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Debbie Clarke
Questions and answers by
Debbie Clarke
Questions (113)
Which of the following is an example of maternal effect?
a. Gene imprinting b. Shell coiling c. Mitochondria d. All of these
1 answer
51 views
Mitochondria
a. Are inherited mostly from the mother. b. Are inherited mostly from the father c. Are inherited equally from the
1 answer
95 views
In crossing over
a. Genetic exchange occurs before chromosome replication b. The probability of its occurrence decreases with
1 answer
90 views
Which of the statements below regarding X-linked inheritance of a recessive trait is FALSE?
a. Heterozygous females will transmit
1 answer
106 views
A maternal effect gene exist in dominant A (normal) allele and recessive a (abnormal) allele. What would be the ratios of
1 answer
116 views
A maternal effect gene exist in dominant A (normal) allele and recessive a (abnormal) allele. What would be the ratios of
1 answer
114 views
Three corn seed traits are C for red, c for white ,S for plump, s for shrunken, W for normal, w for waxy. Use the data from the
1 answer
131 views
Three corn seed traits are C for red, c for white ,S for plump, s for shrunken, W for normal, w for waxy. Use the data from the
1 answer
77 views
To which of the following does the term heteroplasmy refer?
a. cells with a variable mixture of normal and abnormal organelles b.
1 answer
56 views
A region of DNA is imprinted through:
a. DNA methylation b.chromatin modification c.deletion d.mutation
1 answer
70 views
Which syndrome is due to lacking one chromosome?
a.Down syndrome b.Klinefelter syndrome c.Turner's syndrome d.Edward's syndrome
1 answer
124 views
Nondisjunction during meiosis I
a.occurs when homologous chromosomes do not separate c.results in 4 cells with too many or too
1 answer
98 views
The diagram is an example of
a.Abnormalities in chromosome structures b.Reciprocal translocation c.Nonreciprocal translocation d.
1 answer
91 views
________ genomes consist of multiple sets of chromosomes from multiple species.
a.Monoploid b.Autopolyploid c.Polyploid d.
1 answer
70 views
A chromosome with a very short arm and a very long arm is referred to as
a.Metacentric b.Telocentric c.Acrocentric
1 answer
76 views
Consider this sequence A—•—B —C—D—E—F, be a DNA sequence where • is the centromere. Which of the following will
1 answer
61 views
In maternal effect, the individual's phenotype ___________.
is determined by its genotype is determined by the mother's phenotype
1 answer
84 views
Which of the following is not true about inversion?
Inverted chromosomes are generally viable Inversion can cause chromosome
1 answer
120 views
The basic diploid chromosome number in Chrysanthemum is 18. A new species of Chrysanthemum is found that has four complete sets
29 answers
148 views
An individual has the following reciprocal translocation:
What is the name of the structure formed during meiosis, as the
1 answer
93 views
An individual has the following reciprocal translocation:
a. What would be the outcome of alternate segregation? b.What would be
1 answer
81 views
In an East Indian mango, three genes are linked on the same chromosome. Heavy bloom is dominant to light bloom, skin that is
4 answers
208 views
You want to clone the mouse β-globin gene into an expression vector. Outline the steps you would take to insert this gene into
1 answer
84 views
What is extranuclear inheritance? Describe three examples. Explain the variegated phenotype in Mirabilis jalapa (four-o- clock
1 answer
80 views
Explain the heterozygote advantage of the sickle cell β-globin allele in areas where malaria is prevalent
1 answer
75 views
The primary advantage of sexual reproduction is:
It maintains the chromosome number for the species. It is necessary to protect
1 answer
85 views
The primary advantage of sexual reproduction is:
It maintains the chromosome number for the species. It is necessary to protect
1 answer
91 views
Which type of change in chromosome structure is most likely to be detrimental?
Deletions. Inversions molecular genetics.
1 answer
78 views
Which of the following best describes the term genetic variation?
Differences in inherited traits within individuals of a
1 answer
95 views
The DNA sequence recognized by an endonuclease is called a(n) ____________.
Ligation site Insertion site Cleavage site
1 answer
123 views
The basic unit of heredity is called the _____________.
protein trait gene enzyme nucleotide
1 answer
74 views
Which of the following methods of calculating probability is used if the order of a specific number of events occurring in the
6 answers
140 views
Which of the following is the most likely explanation for a high rate of crossing-over between two genes?
The two genes are far
1 answer
135 views
In a Chi square test of a genetic cross there are n different phenotypic classes in the offspring. What is the value for the
1 answer
83 views
If an organism contains two identical alleles for the same trait, it is said to be which of the following?
Cross-fertilized
1 answer
69 views
A testcross is always conducted between an individual whose genotype is unknown and which of the following?
A heterozygous
1 answer
118 views
A reciprocal cross is used to determine which of the following?
If a trait is autosomal or sex-linked The number of autosomal
1 answer
109 views
Genetic drift refers to changes in allele frequencies in a population due to _________.
Stabilization. Random fluctuations.
1 answer
76 views
Bacteria reproduce by ___________.
Mitosis Meiosis Binary fission Reductive division All of the above
1 answer
66 views
In which of the following is the male of the species the homogametic sex?
X-Y system Z-W system X-O system Haplodiploid system
1 answer
53 views
What happens during the denaturation step of PCR?
The DNA nucleotides are broken apart. The DNA returns to its natural form. The
1 answer
133 views
Which of the following statements is NOT true about genomic imprinting?
It is re-established in germ cells It is established
1 answer
80 views
Coat colour in rabbits and human blood groups are both examples of ____________.
multiple allele systems epistatic interactions
1 answer
79 views
Which process may be used in gene mapping?
Transformation Transduction Conjugation A and B B and C
3 answers
87 views
A trait that is only expressed on the sex chromosome is known as _________.
temperature-sensitive alleles sex-influenced
4 answers
122 views
Positive interference on a chromosome is best defined as:
The repression of recombination during mitosis. The inhibition of one
1 answer
94 views
Single-stranded unpaired DNA extensions formed by endonucleases upon cleavage are known as _______________.
Sticky ends. Blunt
1 answer
100 views
When testing for linkage using a chi-square analysis, what should be the hypothesis?
That the traits are linked. That the traits
3 answers
110 views
The synaptonemal complex is formed during ____________.
Leptotene Prophase II Telophase I Prophase I None of the above
1 answer
49 views
One map unit is equal to which of the following?
100 nucleotides 1% of the chromosome 1% mutation rate 1% recombination rate None
1 answer
77 views
In which of the following do the bacteria have to be in physical contact for gene transfer to occur?
Transduction Transformation
1 answer
76 views
The transfer of genetic material between two different species is called __________.
vertical gene transfer horizontal gene
1 answer
111 views
What two mechanisms are responsible for the development of Trisomy 21?
Translocation and duplication Inversion and nondisjunction
1 answer
88 views
Embryonic stem cells (ESC) are ______________.
totipotent multipotent unipotent pluripotent none of the above
1 answer
56 views
A human XXXY cell would contain how many Barr bodies?
0 1 2 3 4
1 answer
64 views
mtDNA and cpDNA is associated with the study of _________ inheritance.
extranuclear epigenetic Mendelian Darwinian Nuclear
1 answer
82 views
What are the expected phenotypic ratios from the following cross:
Tt Rr YY Aa × Tt rr Yy Aa, where T = tall, t = dwarf, R =
1 answer
84 views
In corn, purple kernels (D) are dominant over yellow (d) and smooth kernels (G) are dominant over shrunken (g). and ear of corn
1 answer
79 views
In humans, the allele for brown eye color (B) is dominant to blue eye color (b). If two heterozygous parents produce seven
1 answer
103 views
In the chinchilla, albino coat color is a recessive trait. Researchers transplanted ovaries from an albino female chinchilla
1 answer
101 views
What are the expected phenotypic ratios from the following cross:
Tt Rr YY Aa × Tt rr Yy Aa, where T = tall, t = dwarf, R =
4 answers
106 views
What are the expected phenotypic ratios from the following cross:
Tt Rr YY Aa × Tt rr Yy Aa, where T = tall, t = dwarf, R =
1 answer
88 views
Describe the subdivisions of prophase of meiosis I. Give named and diagrammed examples for the structures that may be present in
1 answer
79 views
What is the name of the parent compound for the glycerol-based phospholipids?
1 answer
74 views
To which part of the glycerol- based phospholipid are the different head groups attached?
1 answer
62 views
What is the head group found in cardiolipin?
1 answer
62 views
What is the significance of the glycerol backbone in the glycerophosphalipids?
1 answer
98 views
Name two head group found in glycerophosphalipids
1 answer
65 views
What are the three components of a nucleotide
1 answer
65 views
What are cyclic nucleotides?
1 answer
67 views
What are nucleic acids?
1 answer
58 views
Define DNA and RNA and give two differences between them?
1 answer
53 views
Give the base pairs found in DNA?
1 answer
71 views
What are the major minerals? Give one source
1 answer
60 views
What are trace elements? Give one source
3 answers
91 views
Give the result of a deficiency of one mineral
1 answer
65 views
Chose a vitamin. Outline the structure, source , function and deficiency associated with this vitamin
1 answer
69 views
Describe the gene and chromosomes mutation that can occurs in DNA
1 answer
81 views
RNA polymerase I may be found in the ____________________.
Nucleolus Nucleoplasm Cytoplasm All of the above
1 answer
67 views
Vitamin D helps in the absorption of which of the following elements?
Iodine and Calcium Iron and Iodine Calcium and Iron Calcium
1 answer
85 views
The AUG start codon codes for which of the following amino acids?
Methionine Valine Phenylalanine Glycine
1 answer
88 views
Which site of tRNA molecule hydrogen bonds to a mRNA molecule.
Codon Anticodon 5’ ends of the tRNA molecule 3’ ends of the
1 answer
89 views
Which of the following statements is true?
The fully demethylated head of a-tocopherol increases its activity. The fully
1 answer
82 views
Kinases are enzymes that ____________________.
Transfer phosphate groups to macromolecules Remove phosphate groups from
1 answer
120 views
Most colour-blindness is sex-linked because of which of the following?
The presence of pigment genes on the X-chromosome The
1 answer
95 views
__________________ is a trace element?
Calcium Magnesium Chloride Manganese
1 answer
51 views
Which of the following enzymes separates the two strands of DNA during replication?
Gyrase Topoisomerase Helicase DNA polymerase
1 answer
106 views
Phospho-regulation functions in which process?
Apoptosis Signal transduction Growth and cell cycle progression All of the above
1 answer
67 views
Deficiency of which of the following vitamins causes slow blood coagulation?
Vitamin B Vitamin K Vitamin C Vitamin D
1 answer
108 views
During replication, Okazaki fragments elongate _____________________.
Leading strand towards the replication fork Lagging strand
2 answers
90 views
Waxes are ____________________.
Esters of long-chain alcohols with long-chain fatty acids Ethers of long-chain alcohols with
1 answer
93 views
Which of the following minerals may be found in nuts?
Chromium Magnesium Copper All of the above
1 answer
71 views
What happens during the denaturation step of PCR?
The DNA nucleotides are broken apart. The DNA returns to its natural form. The
2 answers
118 views
Which of the following results from the action of phospholipase A on phosphatidic acid?
Diacylglycerol
1 answer
88 views
The template DNA chain for RNA synthesis has the following order of bases, AGCTTCGAT. What will be the order of bases in the
1 answer
68 views
Symptoms of scurvy include which of the following?
Gingivitis Muscle weakness Joint aches All of the above
1 answer
77 views
Fatty fish, like salmon, and nuts are foods that increase the blood levels of LDL.
True False
1 answer
79 views
Polyploidy in plants is considered as “good mutations” by agricultural breeders because:
They have extra sets of chromosomes.
1 answer
61 views
The phospholipid effectively forms lipid bilayers and vesicles because of which of the following?
The association of the
1 answer
89 views
The resulting neural tube and brain defects from which of the following vitamins makes it especially important in prenatal care?
1 answer
86 views
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