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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
Embryology, epigenetics, prenatal development, etc.
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The phenomenon of ________ in allopolyploids consists of more rapid growth, increased fruit and ...
The phenomenon of ________ in allopolyploids consists of more rapid growth, increased fruit and ...
The phenomenon of ________ in allopolyploids consists of more rapid growth, increased fruit and flower production, and improved disease resistance.
 
  Fill in the blank(s) with correct word
Matyler98   50   2 Replies
6 years ago
Mg2+ ions are required for optimal DNA polymerase activity (True or false?)
Mg2+ ions are required for optimal DNA polymerase activity (True or false?)
Mg2+ ions are required for optimal DNA polymerase activity.
 
  Indicate whether the statement is true or false
Laney2623   72   1 Reply
6 years ago
Now that small molecular-level deletions and subtle chromosomal rearrangements can be discovered ...
Now that small molecular-level deletions and subtle chromosomal rearrangements can be discovered ...
Now that small molecular-level deletions and subtle chromosomal rearrangements can be discovered using advanced cytogenetic techniques and microarrays, disorders whose causes had not previously been known can have their basis identified.
 
LL06   37   1 Reply
6 years ago
Which of the following methods is least useful for assessing levels of genetic variation in ...
Which of the following methods is least useful for assessing levels of genetic variation in ...
Which of the following methods is least useful for assessing levels of genetic variation in populations?
 
  A) DNA sequencing
  B) VNTRs
  C) Protein electrophoresis
  D) Phenotypic observation
  E) RFLP analysis
Drea Anna   40   1 Reply
6 years ago
A paracentric inversion heterozygote contains a normal chromosome with the long-arm gene order GENE ...
A paracentric inversion heterozygote contains a normal chromosome with the long-arm gene order GENE ...
A paracentric inversion heterozygote contains a normal chromosome with the long-arm gene order GENE and an inverted chromosome with the long-arm gene order GNEE. They form an inversion loop to pair during prophase I of meiosis.
 
  If a si
kyrabunga   54   1 Reply
6 years ago
Which term describes any mechanism that compensates for differences in the number of copies of genes ...
Which term describes any mechanism that compensates for differences in the number of copies of genes ...
Which term describes any mechanism that compensates for differences in the number of copies of genes due to the different chromosome constitutions of males and females?
 
  What will be an ideal response?
WadeChl   74   1 Reply
6 years ago
DNA fingerprinting can be used to convict criminals, but has had little application in exonerating ...
DNA fingerprinting can be used to convict criminals, but has had little application in exonerating ...
DNA fingerprinting can be used to convict criminals, but has had little application in exonerating individuals already convicted.
 
  Indicate whether the statement is true or false
goatMaster   31   2 Replies
6 years ago
What are the regions where DNA-binding proteins can make direct contact with exposed nucleotides? ...
What are the regions where DNA-binding proteins can make direct contact with exposed nucleotides? ...
What are the regions where DNA-binding proteins can make direct contact with exposed nucleotides?
 
  What will be an ideal response?
meli3198   34   1 Reply
6 years ago
________ is rare and occurs most commonly when repetitive regions of homologous chromosomes ...
________ is rare and occurs most commonly when repetitive regions of homologous chromosomes ...
________ is rare and occurs most commonly when repetitive regions of homologous chromosomes misalign, resulting in partial deletions and partial duplications.
 
  Fill in the blank(s) with correct word
yaskween2003   53   1 Reply
6 years ago
What are the key replication enzymes at the replisome, and how is DNA replication on both leading ...
What are the key replication enzymes at the replisome, and how is DNA replication on both leading ...
What are the key replication enzymes at the replisome, and how is DNA replication on both leading and lagging strands made efficient through the conformation of the DNA at the replisome in prokaryotes?
 
  What will be an ideal response?
costfrost   47   1 Reply
6 years ago
You are interested in sequencing the gene for Tangier disease (OMIM 205404). The disorder is rare, ...
You are interested in sequencing the gene for Tangier disease (OMIM 205404). The disorder is rare, ...
You are interested in sequencing the gene for Tangier disease (OMIM 205404). The disorder is rare, so it is feasible to obtain only very few samples. The approximate chromosomal location of the gene is known.
 
  How would you set about de
aphalfi   42   1 Reply
6 years ago
If the genotypic frequencies for an allele in a population at Hardy-Weinberg equilibrium are 0.635 ...
If the genotypic frequencies for an allele in a population at Hardy-Weinberg equilibrium are 0.635 ...
If the genotypic frequencies for an allele in a population at Hardy-Weinberg equilibrium are 0.635 homozygous dominants, 0.430 heterozygotes, and 0.125 homozygous recessives, what is the frequency of the recessive allele?
 
  A) 0.35
vincent_pijen   78   1 Reply
6 years ago
What is removed from dNTPs to provide the energy required for DNA polymerase to catalyze DNA strand ...
What is removed from dNTPs to provide the energy required for DNA polymerase to catalyze DNA strand ...
What is removed from dNTPs to provide the energy required for DNA polymerase to catalyze DNA strand elongation?
 
  What will be an ideal response?
yaskween2003   66   2 Replies
6 years ago
Of the trillions of cells in the human body, most are ________, the cells that form organs and ...
Of the trillions of cells in the human body, most are ________, the cells that form organs and ...
Of the trillions of cells in the human body, most are ________, the cells that form organs and tissues.
 
  Fill in the blank(s) with correct word
meli3198   60   1 Reply
6 years ago
Ti plasmids and the T-DNA system can be used to transform any vascular plant. (True or false?)
Ti plasmids and the T-DNA system can be used to transform any vascular plant. (True or false?)
Ti plasmids and the T-DNA system can be used to transform any vascular plant.
 
  Indicate whether the statement is true or false
Sauce1387   31   1 Reply
6 years ago
During meiosis, what are the gametic consequences of a paracentric inversion with a single crossover ...
During meiosis, what are the gametic consequences of a paracentric inversion with a single crossover ...
During meiosis, what are the gametic consequences of a paracentric inversion with a single crossover event, compared to a pericentric inversion with a single crossover?
 
  What will be an ideal response?
ashlee123   36   1 Reply
6 years ago
________ is a genetic phenomenon that occurs when a normally recessive allele is unmasked and ...
________ is a genetic phenomenon that occurs when a normally recessive allele is unmasked and ...
________ is a genetic phenomenon that occurs when a normally recessive allele is unmasked and expressed in the phenotype because the dominant allele on the homologous chromosome has been deleted.
 
  Fill in the blank(s) with correct word
chayes2321   34   1 Reply
6 years ago
Why is DNA replication referred to as semiconservative?
Why is DNA replication referred to as semiconservative?
Why is DNA replication referred to as semiconservative?
 
  What will be an ideal response?
AyeDocJ   60   1 Reply
6 years ago
Being able to do a BLAST search, among other things, assumes that you and every other researcher has ...
Being able to do a BLAST search, among other things, assumes that you and every other researcher has ...
Being able to do a BLAST search, among other things, assumes that you and every other researcher has access to known gene sequences. Some would prefer, however, that such sequence information should be owned by their discoverers.
 
  What
NicoNaples75   33   2 Replies
6 years ago
Allele frequencies can change across the geographic range of a species according to climate, ...
Allele frequencies can change across the geographic range of a species according to climate, ...
Allele frequencies can change across the geographic range of a species according to climate, geological features, or direction in the range.
 
  For instance, a certain allele frequency might go up along with the elevation or down as you g
Rodderick   33   1 Reply
6 years ago
Which of the following is not a form of genetic drift?
Which of the following is not a form of genetic drift?
Which of the following is not a form of genetic drift?
 
  A) Founder effect
  B) Nonrandom mating
  C) Population bottleneck
  D) Heterozygote advantage
  E) All of these are forms of genetic drift.
lavagirl   50   1 Reply
6 years ago
The ________ varies among species (each species has its characteristic number of pairs) and is ...
The ________ varies among species (each species has its characteristic number of pairs) and is ...
The ________ varies among species (each species has its characteristic number of pairs) and is identified nonspecifically as 2n.
 
  Fill in the blank(s) with correct word
tiffanygaebel   73   1 Reply
6 years ago
What type of experimental technique did Huberman and Riggs use to produce the first evidence of ...
What type of experimental technique did Huberman and Riggs use to produce the first evidence of ...
What type of experimental technique did Huberman and Riggs use to produce the first evidence of bidirectional replication in bacteria?
 
  What will be an ideal response?
J2Thurst   52   1 Reply
6 years ago
Why is an AT-rich sequence characteristic of DNA replicators in all organisms? What will be an ...
Why is an AT-rich sequence characteristic of DNA replicators in all organisms? What will be an ...
Why is an AT-rich sequence characteristic of DNA replicators in all organisms?
 
  What will be an ideal response?
adrianfebrianya   51   1 Reply
6 years ago
Chromosomal translocation involves chromosome breakage and reattachment of the broken segment to a ...
Chromosomal translocation involves chromosome breakage and reattachment of the broken segment to a ...
Chromosomal translocation involves chromosome breakage and reattachment of the broken segment to a ________.
 
  Fill in the blank(s) with correct word
noahrcline   90   1 Reply
6 years ago
A potentially serious problem with Taq polymerase in PCR is its lack of proofreading ability. ...
A potentially serious problem with Taq polymerase in PCR is its lack of proofreading ability. ...
A potentially serious problem with Taq polymerase in PCR is its lack of proofreading ability. Briefly explain why this can be a problem and at which stages during the PCR process this is most and least problematic.
 
  What will be an idea
Matyler98   45   1 Reply
6 years ago
The order of the structural genes in the lac operon is :
The order of the structural genes in the lac operon is :
The order of the structural genes in the lac operon is
 
  A) 5'-lacY-lacZ-lacA-3'.
  B) 3'-lacZ-lacY-lacA-5'.
  C) 5'-lacZ-lacY-lacA-3'.
  D) 3'-lacY-lacA-lacZ-5'.
  E) 5'-lacA-lacY-lacZ-3'.
bummblle   61   1 Reply
6 years ago
The ________ number, or n, is the number of chromosomes contained in the nuclei of gametes, the ...
The ________ number, or n, is the number of chromosomes contained in the nuclei of gametes, the ...
The ________ number, or n, is the number of chromosomes contained in the nuclei of gametes, the nonsomatic cells.
 
  Fill in the blank(s) with correct word
Ebony321   56   1 Reply
6 years ago
What do the DNA sequences found at the origins of replication signify?
What do the DNA sequences found at the origins of replication signify?
What do the DNA sequences found at the origins of replication signify?
 
  What will be an ideal response?
dillosunion   51   1 Reply
6 years ago
Briefly list the basic steps involved in constructing a DNA fingerprint for a paternity case. ...
Briefly list the basic steps involved in constructing a DNA fingerprint for a paternity case. ...
Briefly list the basic steps involved in constructing a DNA fingerprint for a paternity case.
 
  What will be an ideal response?
Rhileybrooke2   54   1 Reply
6 years ago
Genetic drift may lead to :
Genetic drift may lead to :
Genetic drift may lead to
 
  A) loss of genetic variation in a population.
  B) a decrease in the mutation rate of a particular gene.
  C) increased heterozygosity at many loci.
  D) Hardy-Weinberg equilibrium.
  E) Al
kljkjkskss   91   2 Replies
6 years ago
How and why is the two-hybrid system used to find where two proteins interact? Use a real example. ...
How and why is the two-hybrid system used to find where two proteins interact? Use a real example. ...
How and why is the two-hybrid system used to find where two proteins interact? Use a real example.
 
  What will be an ideal response?
Leahc615   55   1 Reply
6 years ago
What well-characterized sequence in E. coli is 245 bp, AT-rich, and divided into three 13-mers and ...
What well-characterized sequence in E. coli is 245 bp, AT-rich, and divided into three 13-mers and ...
What well-characterized sequence in E. coli is 245 bp, AT-rich, and divided into three 13-mers and four 9-mers?
 
  What will be an ideal response?
riley.hively   45   1 Reply
6 years ago
What are the differences in replication between leading and lagging strands in terms of continuity ...
What are the differences in replication between leading and lagging strands in terms of continuity ...
What are the differences in replication between leading and lagging strands in terms of continuity and directionality in relation to the replication fork?
 
  What will be an ideal response?
SDINIC89   67   1 Reply
6 years ago
McClintock's transposable genetic element hypothesis was that the unstable mutant phenotype ...
McClintock's transposable genetic element hypothesis was that the unstable mutant phenotype ...
McClintock's transposable genetic element hypothesis was that the unstable mutant phenotype resulted when a ________ created a mutation by its insertion into the ________ allele and led to reversion when the expression of ________ led to its
 
timmmmy   50   1 Reply
6 years ago
How does a transcribable vector differ from an expression vector?
How does a transcribable vector differ from an expression vector?
How does a transcribable vector differ from an expression vector?
 
  What will be an ideal response?
brunex16013   56   1 Reply
6 years ago
Under what circumstances is a metagenomic analysis preferable to analysis of a gene or genes from a ...
Under what circumstances is a metagenomic analysis preferable to analysis of a gene or genes from a ...
Under what circumstances is a metagenomic analysis preferable to analysis of a gene or genes from a single species?
 
  What will be an ideal response?
Twatson22   56   2 Replies
6 years ago
In the lac operon in E. coli, a nonsense mutation in the ________ gene will result in a loss of ...
In the lac operon in E. coli, a nonsense mutation in the ________ gene will result in a loss of ...
In the lac operon in E. coli, a nonsense mutation in the ________ gene will result in a loss of -galactosidase activity in the cell.
 
  A) lacZ
  B) lacI
  C) lacY
  D) Both A and B
  E) All of these
michelle6899   66   1 Reply
6 years ago
In E. coli, which protein uses ATP to hydrolyze hydrogen bonds holding complementary strands ...
In E. coli, which protein uses ATP to hydrolyze hydrogen bonds holding complementary strands ...
In E. coli, which protein uses ATP to hydrolyze hydrogen bonds holding complementary strands together?
 
  What will be an ideal response?
Lolol   57   1 Reply
6 years ago
What experiment demonstrated that the 5'-to-3' exonuclease activity of DNA polymerase I was ...
What experiment demonstrated that the 5'-to-3' exonuclease activity of DNA polymerase I was ...
What experiment demonstrated that the 5'-to-3' exonuclease activity of DNA polymerase I was essential for cell viability?
 
  What will be an ideal response?
jordant.22   34   1 Reply
6 years ago
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