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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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The chemical colchicine prevents the formation of microtubules. It is commonly used in certain ...
The chemical colchicine prevents the formation of microtubules. It is commonly used in certain ...
The chemical colchicine prevents the formation of microtubules. It is commonly used in certain experimental procedures to cause changes in cellular chromosomes. Which of the following changes is it likely to be used to create?
 
  A) Induc
NicoNaples75   46   1 Reply
6 years ago
As helicase unwinds the DNA molecule, what keeps the strands apart?
As helicase unwinds the DNA molecule, what keeps the strands apart?
As helicase unwinds the DNA molecule, what keeps the strands apart?
 
  A) DNA polymerase
  B) Reverse transcriptase
  C) Replication fork
  D) Single-strand binding proteins
  E) Okazaki fragments
rahrah23   53   1 Reply
6 years ago
How many chromosomes are found in a human somatic cell nucleus?
How many chromosomes are found in a human somatic cell nucleus?
How many chromosomes are found in a human somatic cell nucleus?
 
  What will be an ideal response?
alijan99   70   1 Reply
6 years ago
The only genes necessary for the retroviral lifecycle are gag and pol. (True or false?)
The only genes necessary for the retroviral lifecycle are gag and pol. (True or false?)
The only genes necessary for the retroviral lifecycle are gag and pol.
 
  Indicate whether the statement is true or false
slashbro   33   1 Reply
6 years ago
A portion of one strand of DNA has the sequence 5 AATGGCTTA 3. If this strand is used as a ...
A portion of one strand of DNA has the sequence 5 AATGGCTTA 3. If this strand is used as a ...
A portion of one strand of DNA has the sequence 5 AATGGCTTA 3.
 
  If this strand is used as a template for DNA replication, which of the following correctly depicts the sequence of the newly synthesized strand in the direction in which it
gltech99   42   1 Reply
6 years ago
During gametogenesis, what percentage of gametes would be aneuploid if the nondisjunction event ...
During gametogenesis, what percentage of gametes would be aneuploid if the nondisjunction event ...
During gametogenesis, what percentage of gametes would be aneuploid if the nondisjunction event occurs during meiosis I?
 
  What will be an ideal response?
gltech99   50   2 Replies
6 years ago
Expressed sequence tags, or ESTs, :
Expressed sequence tags, or ESTs, :
Expressed sequence tags, or ESTs,
 
  A) are genetic markers generated from cDNA.
  B) pertain to expressed genes only.
  C) are oligonucleotides derived from mRNA.
  D) A and C only
  E) All of these
typhoon01   38   1 Reply
6 years ago
Species whose ancestors might once have been free living may now be present as parasites. Would ...
Species whose ancestors might once have been free living may now be present as parasites. Would ...
Species whose ancestors might once have been free living may now be present as parasites. Would their genomes now tend to be larger, smaller, or approximately the same in size and complexity?
 
  What will be an ideal response?
Lolol   28   1 Reply
6 years ago
Seedless bananas are produced from :
Seedless bananas are produced from :
Seedless bananas are produced from
 
  A) sterile tetraploid allopolyploid plants.
  B) sterile triploid autopolyploid plants.
  C) monoploid plants grown from unfertilized seeds.
  D) fertile diploid plants that are unferti
Drea Anna   25   1 Reply
6 years ago
After removal of the RNA primers and replacement with DNA nucleotides, the single-stranded nick ...
After removal of the RNA primers and replacement with DNA nucleotides, the single-stranded nick ...
After removal of the RNA primers and replacement with DNA nucleotides, the single-stranded nick adjacent to Okazaki fragments is filled in through a reaction that involves which enzyme?
 
  A) DNA primase
  B) SSB protein
  C) RN
gltech99   44   1 Reply
6 years ago
Most cancer deaths in the United States are caused by radiation-induced cancer. (True or false?)
Most cancer deaths in the United States are caused by radiation-induced cancer. (True or false?)
Most cancer deaths in the United States are caused by radiation-induced cancer.
 
  Indicate whether the statement is true or false
Trejo92   38   1 Reply
6 years ago
How many homologous pairs of chromosomes are found in a human somatic cell nucleus? What will be ...
How many homologous pairs of chromosomes are found in a human somatic cell nucleus? What will be ...
How many homologous pairs of chromosomes are found in a human somatic cell nucleus?
 
  What will be an ideal response?
ronswanson11   78   2 Replies
6 years ago
Based on the following replication bubble, which of these statements is true?
Based on the following replication bubble, which of these statements is true?
Based on the following replication bubble, which of these statements is true?
 
  A) X and Y are leading strands, W and Z are lagging strands
  B) X and Z are leading strands, W and Y are lagging strands
  C) X and W are leading
Goodtomyself   43   1 Reply
6 years ago
During gametogenesis, what percentage of gametes would be trisomic if the nondisjunction event ...
During gametogenesis, what percentage of gametes would be trisomic if the nondisjunction event ...
During gametogenesis, what percentage of gametes would be trisomic if the nondisjunction event occurs during meiosis II?
 
  What will be an ideal response?
ade_tpy99   44   1 Reply
6 years ago
Which of the following techniques is best suited to study protein interactions?
Which of the following techniques is best suited to study protein interactions?
Which of the following techniques is best suited to study protein interactions?
 
  A) PCR
  B) The yeast two-hybrid system
  C) Restriction mapping
  D) RT-PCR
  E) Southern blotting
Salmams   28   1 Reply
6 years ago
The BLAST program from NIH enables a researcher to look for homologous genes. It does so in general ...
The BLAST program from NIH enables a researcher to look for homologous genes. It does so in general ...
The BLAST program from NIH enables a researcher to look for homologous genes. It does so in general by searching for identity in what property?
 
  What will be an ideal response?
yvfgkyv   42   1 Reply
6 years ago
Cultivated wheat is descended from three distinct species, each with a diploid set of 14 ...
Cultivated wheat is descended from three distinct species, each with a diploid set of 14 ...
Cultivated wheat is descended from three distinct species, each with a diploid set of 14 chromosomes. Thus, it is
 
  A) an allotriploid with 21 chromosomes.
  B) an allotriploid with 42 chromosomes.
  C) an allohexaploid with 84
madisonbodiford   59   1 Reply
6 years ago
Which enzyme elongates the new DNA strand starting at an RNA primer?
Which enzyme elongates the new DNA strand starting at an RNA primer?
Which enzyme elongates the new DNA strand starting at an RNA primer?
 
  A) DNA polymerase I
  B) DNA polymerase III
  C) RNA primase
  D) DNA ligase
  E) RNA polymerase
madisonbodiford   65   2 Replies
6 years ago
What is the name of the chromosomal region, located on region 21q22.2, that was identified by ...
What is the name of the chromosomal region, located on region 21q22.2, that was identified by ...
What is the name of the chromosomal region, located on region 21q22.2, that was identified by studying individuals with partial trisomy of chromosome 21?
 
  What will be an ideal response?
typhoon01   52   1 Reply
6 years ago
List the ways in which proto-oncogenes may be converted to oncogenes.
List the ways in which proto-oncogenes may be converted to oncogenes.
List the ways in which proto-oncogenes may be converted to oncogenes.
 
  What will be an ideal response?
rocketleague   84   1 Reply
6 years ago
How many total chromatids are found in a human somatic cell nucleus during G2 phase? What will be ...
How many total chromatids are found in a human somatic cell nucleus during G2 phase? What will be ...
How many total chromatids are found in a human somatic cell nucleus during G2 phase?
 
  What will be an ideal response?
ARJAY270   57   1 Reply
6 years ago
Interspecific genome studies show us conserved sequences, but intraspecific comparisons identify ...
Interspecific genome studies show us conserved sequences, but intraspecific comparisons identify ...
Interspecific genome studies show us conserved sequences, but intraspecific comparisons identify what?
 
  What will be an ideal response?
dillosunion   58   1 Reply
6 years ago
In humans, many types of cancers are associated with chromosomal mutations. (True or false?)
In humans, many types of cancers are associated with chromosomal mutations. (True or false?)
In humans, many types of cancers are associated with chromosomal mutations.
 
  Indicate whether the statement is true or false
valerie2500   39   1 Reply
6 years ago
In Drosophila and Lepidoptera, sex-chromosome mosaicism produces what type of sexually ambiguous ...
In Drosophila and Lepidoptera, sex-chromosome mosaicism produces what type of sexually ambiguous ...
In Drosophila and Lepidoptera, sex-chromosome mosaicism produces what type of sexually ambiguous phenotype?
 
  What will be an ideal response?
J2Thurst   34   2 Replies
6 years ago
Suppose a geneticist sequences a specific gene region in two species, A and B, previously known to ...
Suppose a geneticist sequences a specific gene region in two species, A and B, previously known to ...
Suppose a geneticist sequences a specific gene region in two species, A and B, previously known to be closely related. He specifically wants to see which of the two species is closer to an ancestral species.
 
  The sequence comparison sho
bummblle   35   1 Reply
6 years ago
The terms proto-oncogene and oncogene may give the misleading impression that these are genes for ...
The terms proto-oncogene and oncogene may give the misleading impression that these are genes for ...
The terms proto-oncogene and oncogene may give the misleading impression that these are genes for cancer that are waiting to be turned on.
 
  What are these genes, in terms of normal function, and what name might have been given to them t
ronswanson11   58   1 Reply
6 years ago
What process is used to make mature germ-line cells, or gametes?
What process is used to make mature germ-line cells, or gametes?
What process is used to make mature germ-line cells, or gametes?
 
  What will be an ideal response?
SDINIC89   80   1 Reply
6 years ago
The following represents a DNA strand in the process of replication. The bottom sequence is that of ...
The following represents a DNA strand in the process of replication. The bottom sequence is that of ...
The following represents a DNA strand in the process of replication. The bottom sequence is that of the DNA strand with polarity indicated and the top sequence represents the RNA primer.
 
  GGGGCCUUU 5 AAATCCCCGGAAACTAAAC 3 Which of the f
vincent_pijen   48   1 Reply
6 years ago
In yeast, expression of the GAL genes is induced when there is ________ in the culture medium.
In yeast, expression of the GAL genes is induced when there is ________ in the culture medium.
In yeast, expression of the GAL genes is induced when there is ________ in the culture medium.
 
  A) glucose
  B) lactose
  C) galactose
  D) maltose
  E) Any of these
Kfields37   31   1 Reply
6 years ago
Of the three mechanisms leading to autopolyploidy, which is the most rare event? What will be an ...
Of the three mechanisms leading to autopolyploidy, which is the most rare event? What will be an ...
Of the three mechanisms leading to autopolyploidy, which is the most rare event?
 
  What will be an ideal response?
adrianfebrianya   32   2 Replies
6 years ago
An Alu sequence is a kind of retrotransposon, and approximately 1.4 million of them are found in the ...
An Alu sequence is a kind of retrotransposon, and approximately 1.4 million of them are found in the ...
An Alu sequence is a kind of retrotransposon, and approximately 1.4 million of them are found in the human genome. As they move about in the genome, they generate mutation by what mechanism?
 
  What will be an ideal response?
Ebony321   34   1 Reply
6 years ago
What is the short segment of the cell cycle during which genetic material is partitioned equally to ...
What is the short segment of the cell cycle during which genetic material is partitioned equally to ...
What is the short segment of the cell cycle during which genetic material is partitioned equally to two daughter cells?
 
  What will be an ideal response?
GermanBiter14   54   1 Reply
6 years ago
What is one difference between DNA replication in bacteria versus eukaryotes?
What is one difference between DNA replication in bacteria versus eukaryotes?
What is one difference between DNA replication in bacteria versus eukaryotes?
 
  A) Eukaryotic chromosomes are replicated bidirectionally, while bacterial chromosomes are replicated in one direction.
  B) Eukaryotic chromosomes have
Sauce1387   55   1 Reply
6 years ago
After a region of DNA has been replicated, ________ removes the RNA primers.
After a region of DNA has been replicated, ________ removes the RNA primers.
After a region of DNA has been replicated, ________ removes the RNA primers.
 
  A) DNA polymerase I
  B) DNA polymerase III
  C) DNA helicase
  D) RNA primase
  E) DNA ligase
Ebony321   52   1 Reply
6 years ago
When yeast cells are cultured in the presence of both glucose and galactose, the GAL genes are :
When yeast cells are cultured in the presence of both glucose and galactose, the GAL genes are :
When yeast cells are cultured in the presence of both glucose and galactose, the GAL genes are
 
  A) transcribed and then translated.
  B) transcribed but not translated.
  C) neither transcribed nor translated.
  D) transl
GIVEMEAWNSERFUC   43   1 Reply
6 years ago
Programmed cell death, or apoptosis, is a necessary and useful property of cells. Why is this so? ...
Programmed cell death, or apoptosis, is a necessary and useful property of cells. Why is this so? ...
Programmed cell death, or apoptosis, is a necessary and useful property of cells. Why is this so?
 
  What will be an ideal response?
Laney2623   50   2 Replies
Laney2623
6 years ago
A tetraploid cell contains four chromosomes (True or false?)
A tetraploid cell contains four chromosomes (True or false?)
A tetraploid cell contains four chromosomes.
 
  Indicate whether the statement is true or false
jdubes   48   1 Reply
6 years ago
If a cell begins to divide rapidly (as often seen in wound repair), what would you expect to happen ...
If a cell begins to divide rapidly (as often seen in wound repair), what would you expect to happen ...
If a cell begins to divide rapidly (as often seen in wound repair), what would you expect to happen to the G1 phase?
 
  What will be an ideal response?
SDINIC89   42   1 Reply
6 years ago
During DNA replication in E. coli, what is the role of DnaA?
During DNA replication in E. coli, what is the role of DnaA?
During DNA replication in E. coli, what is the role of DnaA?
 
  A) DnaA is a region of DNA recognized by the replisome where replication is initiated.
  B) DnaA bends DNA, hydrolyzing the hydrogen bonds in the 13-mer region of oriC a
littlescientist   45   1 Reply
6 years ago
Which enzyme replaces RNA primers with DNA after elongation?
Which enzyme replaces RNA primers with DNA after elongation?
Which enzyme replaces RNA primers with DNA after elongation?
 
  A) DNA polymerase I
  B) DNA polymerase III
  C) RNA polymerase
  D) RNA primase
  E) DNA ligase
Sauce1387   60   1 Reply
6 years ago
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