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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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What are the two chemical structures found in RNA but not DNA?
What are the two chemical structures found in RNA but not DNA?
What are the two chemical structures found in RNA but not DNA?
 
  What will be an ideal response?
riley.hively   42   1 Reply
6 years ago
In parent-offspring regression, the average value of the parents is termed the :
In parent-offspring regression, the average value of the parents is termed the :
In parent-offspring regression, the average value of the parents is termed the
 
  A) mean parental value.
  B) parental average.
  C) midparent value.
  D) median parental value.
  E) modal parental value.
jeremy.l32   54   1 Reply
6 years ago
How do scientists, lacking the ability to make controlled genetic crosses in humans, study the ...
How do scientists, lacking the ability to make controlled genetic crosses in humans, study the ...
How do scientists, lacking the ability to make controlled genetic crosses in humans, study the inheritance of and give genetic counseling on human genetic disorders?
 
  What will be an ideal response?
alijan99   57   1 Reply
6 years ago
Bacteria grown at 45C initiate expression of which two types of proteins?
Bacteria grown at 45C initiate expression of which two types of proteins?
Bacteria grown at 45C initiate expression of which two types of proteins?
 
  What will be an ideal response?
adrianfebrianya   37   1 Reply
6 years ago
Unlike bacterial operons, eukaryotic operons :
Unlike bacterial operons, eukaryotic operons :
Unlike bacterial operons, eukaryotic operons
 
  A) are all positively controlled.
  B) are all negatively controlled.
  C) are restricted to certain eukaryotic kingdoms.
  D) are exceedingly rare.
  E) None of these
jordant.22   55   1 Reply
6 years ago
In humans, the 30S pre-RNA transcript yields three rRNA segments following transcription and RNA ...
In humans, the 30S pre-RNA transcript yields three rRNA segments following transcription and RNA ...
In humans, the 30S pre-RNA transcript yields three rRNA segments following transcription and RNA cleavage. What RNA transcripts are generated by the 30S pre-RNA transcript in E. coli?
 
  A) two rRNAs (15S each)
  B) three rRNAs (5S,
littlescientist   36   1 Reply
6 years ago
Cells obtained from a Triplo-X woman would contain ________ Barr bodies.
Cells obtained from a Triplo-X woman would contain ________ Barr bodies.
Cells obtained from a Triplo-X woman would contain ________ Barr bodies.
 
  A) 0
  B) 1
  C) 2
  D) 3
  E) 4
tiffanygaebel   46   1 Reply
6 years ago
Chloroplast RNA undergoes _______, which is the alteration of the RNA sequence after transcription. ...
Chloroplast RNA undergoes _______, which is the alteration of the RNA sequence after transcription. ...
Chloroplast RNA undergoes _______, which is the alteration of the RNA sequence after transcription.
 
  Fill in the blank(s) with correct word
ade_tpy99   36   1 Reply
6 years ago
A person with PKU controls the buildup of phenylpyruvic acid in his or her blood by restricting ...
A person with PKU controls the buildup of phenylpyruvic acid in his or her blood by restricting ...
A person with PKU controls the buildup of phenylpyruvic acid in his or her blood by restricting dietary intake of phenylalanine, thus avoiding the severe symptoms of mental retardation, slow growth rate, and early death.
 
  Yet he or she
jeremy.l32   32   1 Reply
6 years ago
Mutations of trpL decrease the efficiency of transcriptional regulation by disrupting the formation ...
Mutations of trpL decrease the efficiency of transcriptional regulation by disrupting the formation ...
Mutations of trpL decrease the efficiency of transcriptional regulation by disrupting the formation of which stem-loop structure?
 
  What will be an ideal response?
Basketball1121   50   1 Reply
6 years ago
A person with an XO genotype for the sex chromosomes would be phenotypically :
A person with an XO genotype for the sex chromosomes would be phenotypically :
A person with an XO genotype for the sex chromosomes would be phenotypically
 
  A) male.
  B) female.
  C) intersex (both male and female).
  D) male or female with equal probability.
  E) neither male nor female.
viving   70   1 Reply
6 years ago
A Mendelian cross for a three-gene trait is expected to yield ________ F2 genotypes.
A Mendelian cross for a three-gene trait is expected to yield ________ F2 genotypes.
A Mendelian cross for a three-gene trait is expected to yield ________ F2 genotypes.
 
  A) 4
  B) 16
  C) 27
  D) 64
  E) 265
sarweston   40   1 Reply
6 years ago
Individuals with blood type AB have which blood antibody(ies)?
Individuals with blood type AB have which blood antibody(ies)?
Individuals with blood type AB have which blood antibody(ies)?
 
  What will be an ideal response?
ARJAY270   65   1 Reply
6 years ago
A cell exhibits specific defects in the alternative intron splicing pathway. The genes encoding ...
A cell exhibits specific defects in the alternative intron splicing pathway. The genes encoding ...
A cell exhibits specific defects in the alternative intron splicing pathway. The genes encoding which proteins are likely mutated in this cell?
 
  A) histone proteins
  B) transcription factors
  C) transmembrane proteins
 
noahrcline   57   1 Reply
6 years ago
A broad-sense heritability of 0.8 for a particular trait indicates that :
A broad-sense heritability of 0.8 for a particular trait indicates that :
A broad-sense heritability of 0.8 for a particular trait indicates that
 
  A) phenotypic variation stems from environmental influences.
  B) the trait is 80 heritable.
  C) genes and environment play equal roles in shaping the t
Kfields37   75   1 Reply
6 years ago
When a promoter element is bound by a positive regulatory protein, the result is :
When a promoter element is bound by a positive regulatory protein, the result is :
When a promoter element is bound by a positive regulatory protein, the result is
 
  A) activation of replication.
  B) activation of transcription.
  C) activation of translation.
  D) repression of replication.
  E) r
Leahc615   38   1 Reply
6 years ago
What are the names of the three possible alternative stem loops that can form in mRNA? What will ...
What are the names of the three possible alternative stem loops that can form in mRNA? What will ...
What are the names of the three possible alternative stem loops that can form in mRNA?
 
  What will be an ideal response?
Matyler98   51   1 Reply
6 years ago
State the key difference between Mendel's principle of segregation and independent assortment. ...
State the key difference between Mendel's principle of segregation and independent assortment. ...
State the key difference between Mendel's principle of segregation and independent assortment.
 
  What will be an ideal response?
Matyler98   75   1 Reply
6 years ago
Transcriptional regulation of mitochondrial genes closely resembles regulation of _______ operons. ...
Transcriptional regulation of mitochondrial genes closely resembles regulation of _______ operons. ...
Transcriptional regulation of mitochondrial genes closely resembles regulation of _______ operons.
 
  Fill in the blank(s) with correct word
coltenyeske@aub   69   1 Reply
6 years ago
Individuals with blood type A have which blood antigen(s)?
Individuals with blood type A have which blood antigen(s)?
Individuals with blood type A have which blood antigen(s)?
 
  What will be an ideal response?
darcyyyy   43   1 Reply
6 years ago
The proportion of phenotypic variance that results from additive genetic variance is known as ...
The proportion of phenotypic variance that results from additive genetic variance is known as ...
The proportion of phenotypic variance that results from additive genetic variance is known as ________ heritability.
 
  A) broad-sense
  B) narrow-sense
  C) multifactorial
  D) generic
  E) genetic
Leahc615   47   1 Reply
6 years ago
What is an essential amino acid? Give an example.
What is an essential amino acid? Give an example.
What is an essential amino acid? Give an example.
 
  What will be an ideal response?
c9day   67   1 Reply
6 years ago
Which molecule functions as the corepressor in the trp operon?
Which molecule functions as the corepressor in the trp operon?
Which molecule functions as the corepressor in the trp operon?
 
  What will be an ideal response?
ashlee123   61   1 Reply
6 years ago
A cell has a defect in polyadenylation. The RNA transcripts encoding which type of protein would not ...
A cell has a defect in polyadenylation. The RNA transcripts encoding which type of protein would not ...
A cell has a defect in polyadenylation. The RNA transcripts encoding which type of protein would not be affected by this defect because they are not polyadenylated?
 
  A) histone proteins
  B) transcription factors
  C) transmem
ronswanson11   51   1 Reply
6 years ago
Explain why it is expected that heterozygotes will be produced twice as frequently as either ...
Explain why it is expected that heterozygotes will be produced twice as frequently as either ...
Explain why it is expected that heterozygotes will be produced twice as frequently as either homozygote in a monohybrid F1 cross.
 
  What will be an ideal response?
ashlee123   30   1 Reply
6 years ago
Mitochondrial mutations in mammals are passed to the offspring by the ________ parent. (Fill in the blank)
Mitochondrial mutations in mammals are passed to the offspring by the ________ parent. (Fill in the blank)
Mitochondrial mutations in mammals are passed to the offspring by the ________ parent.
 
  Fill in the blank(s) with correct word
aschaffer   51   1 Reply
6 years ago
A similarity between regulation of the lac operon in bacteria and the regulation of galactose ...
A similarity between regulation of the lac operon in bacteria and the regulation of galactose ...
A similarity between regulation of the lac operon in bacteria and the regulation of galactose utilization in yeast is that both pathways
 
  A) transcribe all the genes necessary as one polycistronic mRNA.
  B) use feedback inhibition
stu.nehagupta   76   1 Reply
6 years ago
When graphing a distribution of phenotypes for a continuous trait, a broad curve implies :
When graphing a distribution of phenotypes for a continuous trait, a broad curve implies :
When graphing a distribution of phenotypes for a continuous trait, a broad curve implies
 
  A) little variation in the phenotypes.
  B) a large standard deviation.
  C) a small variance.
  D) a large correlation coefficient
ade_tpy99   41   1 Reply
6 years ago
Microbial genomics is a rapidly growing field. Of great interest to geneticists is the search for ...
Microbial genomics is a rapidly growing field. Of great interest to geneticists is the search for ...
Microbial genomics is a rapidly growing field. Of great interest to geneticists is the search for new operons as new microbial genome sequences become available.
 
  What kind of signature or identifying feature would you look for as you s
litty 123   34   1 Reply
6 years ago
Which enzyme is required to initiate 5 capping of eukaryotic mRNA transcripts by removing the ...
Which enzyme is required to initiate 5 capping of eukaryotic mRNA transcripts by removing the ...
Which enzyme is required to initiate 5 capping of eukaryotic mRNA transcripts by removing the terminal phosphate group?
 
  A) ribozyme
  B) guanylyl transferase
  C) methyl transferase
  D) adenylyl cyclase
  E) phosph
Basketball1121   48   1 Reply
6 years ago
Alleles of the Sbe1 gene, which controls pea shape, can be detected by DNA analysis. In heterozygous ...
Alleles of the Sbe1 gene, which controls pea shape, can be detected by DNA analysis. In heterozygous ...
Alleles of the Sbe1 gene, which controls pea shape, can be detected by DNA analysis. In heterozygous plants, two distinct bands of DNA are visible. What is the relationship between the alleles of the heterozygote at the molecular level?
 
tiffanygaebel   55   1 Reply
6 years ago
In the 1950s, mitochondrial genomes were discovered by differential staining for ________.
In the 1950s, mitochondrial genomes were discovered by differential staining for ________.
In the 1950s, mitochondrial genomes were discovered by differential staining for ________.
 
  Fill in the blank(s) with correct word
Rodderick   49   1 Reply
6 years ago
The following is a representation of a metabolic pathway that involves genes for enzymes A, B, C, ...
The following is a representation of a metabolic pathway that involves genes for enzymes A, B, C, ...
The following is a representation of a metabolic pathway that involves genes for enzymes A, B, C, and D: A  B  C  D  product A mutation in the B gene would result in an accumulation of which gene product?
 
  What will be an ideal response
kemkem9   46   1 Reply
6 years ago
In the trp operon, where is the attenuator region located?
In the trp operon, where is the attenuator region located?
In the trp operon, where is the attenuator region located?
 
  What will be an ideal response?
Shaquantta   47   1 Reply
6 years ago
Using the accompanying diagram, which of the following corresponds to the +1 nucleotide?
Using the accompanying diagram, which of the following corresponds to the +1 nucleotide?
Using the accompanying diagram, which of the following corresponds to the +1 nucleotide?
 
  A) A
  B) B
  C) C
  D) F
  E) G
valerie2500   49   1 Reply
6 years ago
Contrast negative (repressor) and positive (CAP) control in the lac operon.
Contrast negative (repressor) and positive (CAP) control in the lac operon.
Contrast negative (repressor) and positive (CAP) control in the lac operon.
 
  What will be an ideal response?
aschaffer   75   1 Reply
6 years ago
You cross a pure-breeding white flower with a pure-breeding red flower, and the offspring are white ...
You cross a pure-breeding white flower with a pure-breeding red flower, and the offspring are white ...
You cross a pure-breeding white flower with a pure-breeding red flower, and the offspring are white with red spots. This is an example of what type of inheritance?
 
  What will be an ideal response?
meli3198   100   1 Reply
6 years ago
Which of the following statements about heritability is true?
Which of the following statements about heritability is true?
Which of the following statements about heritability is true?
 
  A) Broad-sense heritability defines the complete genetic basis of a trait.
  B) Heritability is fixed for a given trait.
  C) Traits shared by members of the same
jeremy.l32   73   1 Reply
6 years ago
What characteristics make an organism a good candidate for Mendelian studies? What will be an ...
What characteristics make an organism a good candidate for Mendelian studies? What will be an ...
What characteristics make an organism a good candidate for Mendelian studies?
 
  What will be an ideal response?
Drea Anna   35   1 Reply
6 years ago
TaySachs disease is most prevalent among populations of the Pennsylvania Amish in the United States. ...
TaySachs disease is most prevalent among populations of the Pennsylvania Amish in the United States. ...
TaySachs disease is most prevalent among populations of the Pennsylvania Amish in the United States.
 
  Indicate whether the statement is true or false
Matyler98   56   1 Reply
6 years ago
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