Genetics and Developmental Biology

In meiosis, interphase is followed by two successive rounds of cell division, meiosis I and II. ...

In meiosis, interphase is followed by two successive rounds of cell division, meiosis I and II. ...

In meiosis, interphase is followed by two successive rounds of cell division, meiosis I and II. Meiosis results in four haploid daughter cells because there is no ________ between these two meiotic cell divisions.
 
  Fill in the blank(s)

Kfields37   70   1 Reply

awintinedebbie1

What is the observed genotypic frequency of Aa individuals?

What is the observed genotypic frequency of Aa individuals?

What is the observed genotypic frequency of Aa individuals?
 
  A) 0.144
  B) 0.72
  C) 0.40
  D) 0.48
  E) 1.44

GermanBiter14   22   1 Reply

virpal jattana

Describe two mechanisms for causing uniparental disomy, and explain how this chromosomal defect is ...

Describe two mechanisms for causing uniparental disomy, and explain how this chromosomal defect is ...

Describe two mechanisms for causing uniparental disomy, and explain how this chromosomal defect is involved in Prader-Willi syndrome and Angelman syndrome.
 
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hay456   42   2 Replies

hay456

Sigma virus infection in Drosophila melanogaster causes flies to become paralyzed and then die in ...

Sigma virus infection in Drosophila melanogaster causes flies to become paralyzed and then die in ...

Sigma virus infection in Drosophila melanogaster causes flies to become paralyzed and then die in high concentrations of CO2. The virus is passed on extrachromosomally.
 
  Two isogenic strains of Drosophila cultures are maintained: R (res

aphalfi   49   1 Reply

elementalsulfur

The inducer of the lac operon is :

The inducer of the lac operon is :

The inducer of the lac operon is
 
  A) galactose.
  B) glucose.
  C) allolactose.
  D) repressor protein.
  E) permease.

yaskween2003   44   1 Reply

applebeeds

How is aneuploidy different from polyploidy? What are the mechanisms by which aneuploidy and ...

How is aneuploidy different from polyploidy? What are the mechanisms by which aneuploidy and ...

How is aneuploidy different from polyploidy? What are the mechanisms by which aneuploidy and polyploidy are caused, and what are the consequences of these chromosomal alterations in terms of survival and fertility of the offspring?
 
  Wha

vincent_pijen   61   1 Reply

SarahSureShot

A cross is made between yeast cells with different alleles for a set of linked genes: pr+q p+rq+. ...

A cross is made between yeast cells with different alleles for a set of linked genes: pr+q p+rq+. ...

A cross is made between yeast cells with different alleles for a set of linked genes: pr+q  p+rq+. The resulting tetrads show a 3:1 ratio for r+ to r instead of the expected 2:2 ratio. Can you explain how this could have occurred?
 
  What

rocketleague   72   1 Reply

erical5

What is the frequency of the a allele in the butterfly population?

What is the frequency of the a allele in the butterfly population?

What is the frequency of the a allele in the butterfly population?
 
  A) 0.16
  B) 0.04
  C) 0.40
  D) 0.64
  E) 0.40

Rhileybrooke2   36   1 Reply

Alonzoperez1118

Synapsis initiates formation of a protein bridge called the synaptonemal complex, a tri-layer ...

Synapsis initiates formation of a protein bridge called the synaptonemal complex, a tri-layer ...

Synapsis initiates formation of a protein bridge called the synaptonemal complex, a tri-layer protein structure that maintains synapsis by tightly binding ________ of homologous chromosomes to one another.
 
  Fill in the blank(s) with cor

Basketball1121   44   1 Reply

Tskotar

During DNA replication in E. coli, how does the cell prevent the DNA strands from following their ...

During DNA replication in E. coli, how does the cell prevent the DNA strands from following their ...

During DNA replication in E. coli, how does the cell prevent the DNA strands from following their natural tendency to seek maximum stability and reanneal?
 
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markiplier908   30   1 Reply

fahadr

Study of P elements in Drosophila has shown that gene regulation can be accomplished by differential ...

Study of P elements in Drosophila has shown that gene regulation can be accomplished by differential ...

Study of P elements in Drosophila has shown that gene regulation can be accomplished by differential mRNA transcript processing. Explain.
 
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Laney2623   60   1 Reply

agollub

A cell or organism in which all copies of the cytoplasmic organelle gene are the same is said to be ...

A cell or organism in which all copies of the cytoplasmic organelle gene are the same is said to be ...

A cell or organism in which all copies of the cytoplasmic organelle gene are the same is said to be __________.
 
  A) homozygous
  B) heteroplasmic
  C) homoplasmic
  D) variegated
  E) uniparental

hihihihihihi   35   1 Reply

coupongurl69

Attenuation of the trp operon fails to occur when :

Attenuation of the trp operon fails to occur when :

Attenuation of the trp operon fails to occur when
 
  A) a lack of tryptophan causes stalling of ribosomes on the leader sequence of the RNA.
  B) an RNA stem-loop forms that allows transcription to continue.
  C) an RNA stem-loo

ekmj   34   1 Reply

603nurbk

Random segregation of organelles during cell division is likely to result in an increased rate of ...

Random segregation of organelles during cell division is likely to result in an increased rate of ...

Random segregation of organelles during cell division is likely to result in an increased rate of which of the following?
 
  A) incomplete penetrance
  B) dominant loss-of-function mutations
  C) dominant gain-of-function mutati

lavagirl   41   1 Reply

The Truth

Compare and contrast the two types of transposable elements found in bacteria. Provide examples of ...

Compare and contrast the two types of transposable elements found in bacteria. Provide examples of ...

Compare and contrast the two types of transposable elements found in bacteria. Provide examples of how transposable elements can be both harmful and beneficial to bacteria.
 
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19zbell   55   2 Replies

19zbell

An individual is heterozygous for a gene at a specific locus. Sister chromatids will have _______ ...

An individual is heterozygous for a gene at a specific locus. Sister chromatids will have _______ ...

An individual is heterozygous for a gene at a specific locus. Sister chromatids will have _______ (the same form/different form) of alleles at that locus after S phase.
 
  Fill in the blank(s) with correct word

koala423   46   1 Reply

dawkins0126@aol

Describe the method devised by Arthur Kornberg which first successfully achieved DNA synthesis in ...

Describe the method devised by Arthur Kornberg which first successfully achieved DNA synthesis in ...

Describe the method devised by Arthur Kornberg which first successfully achieved DNA synthesis in vitro, including its components and their uses.
 
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Rodderick   39   1 Reply

123qwer121

How does an RFLP help identify sickle-cell anemia?

How does an RFLP help identify sickle-cell anemia?

How does an RFLP help identify sickle-cell anemia?
 
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ade_tpy99   38   1 Reply

ninja320

Synonymous mutations are found much more frequently than nonsynonymous mutations because :

Synonymous mutations are found much more frequently than nonsynonymous mutations because :

Synonymous mutations are found much more frequently than nonsynonymous mutations because
 
  A) mutations do not occur randomly
  B) the genetic code is redundant.
  C) of genetic drift.
  D) there is a selective advantage i

jeremy.l32   42   1 Reply

Beula74

To inhibit the transcription of operon genes, the lacI gene product binds to :

To inhibit the transcription of operon genes, the lacI gene product binds to :

To inhibit the transcription of operon genes, the lacI gene product binds to
 
  A) the operator.
  B) the promoter.
  C) the repressor.
  D) the inducer.
  E) -galactosidase.

Naf87   71   1 Reply

janeliz

P elements in Drosophila contribute to the process of hybrid dysgenesis, which occurs when ...

P elements in Drosophila contribute to the process of hybrid dysgenesis, which occurs when ...

P elements in Drosophila contribute to the process of hybrid dysgenesis, which occurs when M-cytotype females are crossed with P-cytotype males.
 
  What does the model of hybrid dysgenesis predict for the F1 and F2 generations when a P-cy

aj20386   49   2 Replies

aj20386

________ is the ultimate source of genetic variation in populations.

________ is the ultimate source of genetic variation in populations.

________ is the ultimate source of genetic variation in populations.
 
  A) Natural selection
  B) Genetic drift
  C) Gene flow
  D) Mutation
  E) Recombination

Twatson22   66   1 Reply

avantquez

What is the difference between cytokinesis and karyokinesis? Which process needs to be more precise ...

What is the difference between cytokinesis and karyokinesis? Which process needs to be more precise ...

What is the difference between cytokinesis and karyokinesis? Which process needs to be more precise for accurate cell division?
 
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viving   43   1 Reply

Caellis1962

The human egg has about 2000 mitochondrial genomes, but somatic cells have a range of hundreds to ...

The human egg has about 2000 mitochondrial genomes, but somatic cells have a range of hundreds to ...

The human egg has about 2000 mitochondrial genomes, but somatic cells have a range of hundreds to thousands. Which of the following is most likely to account for the difference?
 
  A) Heteroplastic cells can give rise to homoplastic cells

J2Thurst   40   1 Reply

traviswa

What is the overall direction of DNA strand elongation?

What is the overall direction of DNA strand elongation?

What is the overall direction of DNA strand elongation?
 
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stu.nehagupta   45   1 Reply

mikeyp

The diploid set of chromosomes in Drosophila embryos replicates six times faster than the single E. ...

The diploid set of chromosomes in Drosophila embryos replicates six times faster than the single E. ...

The diploid set of chromosomes in Drosophila embryos replicates six times faster than the single E. coli chromosome, even though there is about 100 times more DNA in Drosophila than in E.
 
  coli and the rate of movement of the replicatio

aphalfi   33   1 Reply

rachel.rivera@y

PCR has revolutionized the criminal justice system through DNA fingerprinting. For a given ...

PCR has revolutionized the criminal justice system through DNA fingerprinting. For a given ...

PCR has revolutionized the criminal justice system through DNA fingerprinting.
 
  For a given fragment of DNA, showing that a suspect's fingerprint differs from that found at a crime scene immediately excludes him or her from suspicion, y

sms4lyfe   27   2 Replies

sms4lyfe

In certain Latin American countries during periods of political volatility, children were removed ...

In certain Latin American countries during periods of political volatility, children were removed ...

In certain Latin American countries during periods of political volatility, children were removed from their families and their parents were executed (then referred to as being disappeared).
 
  The methods with the best chance of reunitin

Basketball1121   50   1 Reply

Beula74

What are three important differences between mitosis and meiosis I?

What are three important differences between mitosis and meiosis I?

What are three important differences between mitosis and meiosis I?
 
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Trejo92   51   1 Reply

traviswa

What structure in E. coli delivers primase and accessory proteins to the oriC site to synthesize the ...

What structure in E. coli delivers primase and accessory proteins to the oriC site to synthesize the ...

What structure in E. coli delivers primase and accessory proteins to the oriC site to synthesize the primer needed for DNA replication?
 
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bezel   45   1 Reply

ZoeWarren98

What are some key differences in replication between E. coli DNA and phage DNA? What will be an ...

What are some key differences in replication between E. coli DNA and phage DNA? What will be an ...

What are some key differences in replication between E. coli DNA and  phage DNA?
 
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Naf87   32   1 Reply

Beunique334

Two STR loci were determined to have the following allele frequencies in the general population: STR ...

Two STR loci were determined to have the following allele frequencies in the general population: STR ...

Two STR loci were determined to have the following allele frequencies in the general population: STR A STR B Alleles: 1A: 0.1 1B: 0.4 2A: 0.55 2B: 0.4 3A: 0.25 3B: 0.2 4A: 0.
 
  1 A suspect in a criminal trial was genetically tested for t

gltech99   24   1 Reply

Greygoos3

In a population of frogs, RR homozygotes produce an average of 5 offspring that survive to ...

In a population of frogs, RR homozygotes produce an average of 5 offspring that survive to ...

In a population of frogs, RR homozygotes produce an average of 5 offspring that survive to reproduce. Rr frogs produce 4, and rr frogs produce 1. The fitness of the three genotypes w11, w12, and w22 are respectively
 
  A) 5, 4, and 1.

meli3198   63   2 Replies

meli3198

A lacOC mutation is : (Multiple Choice)

A lacOC mutation is : (Multiple Choice)

A lacOC mutation is
 
  A) constitutive.
  B) cis-dominant.
  C) incompletely dominant.
  D) codominant
  E) recessive.

c9day   74   1 Reply

imtherealslimsh

Describe how microtubules and cohesion work together to align the chromosomes along the metaphase ...

Describe how microtubules and cohesion work together to align the chromosomes along the metaphase ...

Describe how microtubules and cohesion work together to align the chromosomes along the metaphase plate during the process of sister chromatid cohesion.
 
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jordant.22   57   1 Reply

imtherealslimsh

What is the term for the daughter strand synthesized continuously during DNA replication? What ...

What is the term for the daughter strand synthesized continuously during DNA replication? What ...

What is the term for the daughter strand synthesized continuously during DNA replication?
 
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Drea Anna   69   1 Reply

russinhacker

What does the model of hybrid dysgenesis predict for the F1 and F2 generations when an M-cytotype ...

What does the model of hybrid dysgenesis predict for the F1 and F2 generations when an M-cytotype ...

What does the model of hybrid dysgenesis predict for the F1 and F2 generations when an M-cytotype male is crossed to a P-cytotype female?
 
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jordant.22   31   1 Reply

ninja320

How do genetic tests differ from diagnostic tests for genetic disease?

How do genetic tests differ from diagnostic tests for genetic disease?

How do genetic tests differ from diagnostic tests for genetic disease?
 
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jeddsn   64   1 Reply

miri

In reciprocal hybrid crosses, the heterogametic sex is typically sterile while the homogametic sex ...

In reciprocal hybrid crosses, the heterogametic sex is typically sterile while the homogametic sex ...

In reciprocal hybrid crosses, the heterogametic sex is typically sterile while the homogametic sex is not. This phenomenon is referred to as
 
  A) hybrid incompatibility.
  B) postzygotic isolation.
  C) Haldane's rule.
  D

Shaquantta   30   2 Replies

Shaquantta

During transcription of the trp operon, pairing of regions 2 and 3 in the leader peptide mRNA ...

During transcription of the trp operon, pairing of regions 2 and 3 in the leader peptide mRNA ...

During transcription of the trp operon, pairing of regions 2 and 3 in the leader peptide mRNA creates a(n) ________ signal.
 
  A) continuous
  B) termination
  C) antitermination
  D) induction
  E) repression

jeremy.l32   48   1 Reply

Yeheye