BIO 1201 EXAM 3 LSU QUESTIONS &
ANSWERS 100% CORRECT!!
True or False: The purpose of mitosis is to insure that daughter cells have identical
genetic information at the mother cell. - ANSWERtrue
How many centromeres are there per chromosome? - ANSWER1
How many centrosomes per chromosome consist of 2 sister chromatids? -
ANSWER1
When is DNA replicated? - ANSWERS phase
When are sister chromatids separated? - ANSWERAnaphase I
If the DNA content in G2 is X, what is the DNA content of each daughter cell at
Telophase? - ANSWER0.5X
If the DNA content in G1 is X, what is the DNA content of each of the daughter cells
at Telophase? - ANSWERX
DNA replication checkpoint occurs where? - ANSWERG2
We inherit our mitochondria from our... - ANSWERour mother
In mitosis when do homologous chromosome pairs separate? - ANSWERin mitosis,
homologous chromosomes do not separate
In meiosis when do homologous chromosome pairs separate? - ANSWERAnaphase
I
At G2, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - ANSWER0.25X
At G1, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - ANSWER0.5X
At G2 there are 40 chromatids, what is the diploid chromosome number? -
ANSWER20
At G2 there are 40 chromatids, at Telophase II each daughter cells has how many
chromosomes? - ANSWER10
At G2, there are 40 centrosomes, at Telophase II each daughter cell has how many
chromosomes? - ANSWER20
, Why don't we talk about Gossian genetics? - ANSWERhe was not quantitative with
his work
What is the alternative form of a gene? - ANSWERallele
How many different alleles can a diploid individual have at a single gene locus if
there are 4 alleles in the population? - ANSWER2 alleles
True or False: Recessive alleles are not expressed because they code for an
inactive or defective enzyme. - ANSWERtrue
What is an example of a genotype? - ANSWERPP, Pp, or pp
In genetics, what determines what? - ANSWERgenotype determines phenotype
An individual with 2 Barr Bodies has how many chromosomes? - ANSWER3: 2 are
inactive, 1 is active
X chromosome inactivation happens how? - ANSWERrandom and all but one
Calico and tortoiseshell cats are examples of... - ANSWERX chromosome
inactivation
Could an Rh+ man be the father of an Rh- child? - ANSWERyes
If both parents are carriers for sickle cell anemia, what is the percent of their children
that will have the disease? - ANSWER25%
Why is the sickle allele maintained in populations, particularly in Africa and the
Mediterranean Sea area? - ANSWERHeterozygotes are immune to Malaria
Does testing newborns for diseases save money? - ANSWERyes
How much does it cost to test your child in the state of LA? - ANSWER$30
True or False: In an autosomal recessive trait, if two affected individuals have
offspring then all of their children will have the trait. - ANSWERtrue
True or False: In mitosis it does not matter if you have unpaired chromosomes. -
ANSWERtrue
How many barr bodies are there in the nucleus of a Turner's female cell? -
ANSWER0
Turner's female, XO, 45 is n example of... - ANSWERaneuploidy
How many barr bodies in the preceding Klinefelters male (XXXXY)? - ANSWER3
A Klinefelters male, XXY 47, is an example of... - ANSWERaneuploidy
ANSWERS 100% CORRECT!!
True or False: The purpose of mitosis is to insure that daughter cells have identical
genetic information at the mother cell. - ANSWERtrue
How many centromeres are there per chromosome? - ANSWER1
How many centrosomes per chromosome consist of 2 sister chromatids? -
ANSWER1
When is DNA replicated? - ANSWERS phase
When are sister chromatids separated? - ANSWERAnaphase I
If the DNA content in G2 is X, what is the DNA content of each daughter cell at
Telophase? - ANSWER0.5X
If the DNA content in G1 is X, what is the DNA content of each of the daughter cells
at Telophase? - ANSWERX
DNA replication checkpoint occurs where? - ANSWERG2
We inherit our mitochondria from our... - ANSWERour mother
In mitosis when do homologous chromosome pairs separate? - ANSWERin mitosis,
homologous chromosomes do not separate
In meiosis when do homologous chromosome pairs separate? - ANSWERAnaphase
I
At G2, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - ANSWER0.25X
At G1, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - ANSWER0.5X
At G2 there are 40 chromatids, what is the diploid chromosome number? -
ANSWER20
At G2 there are 40 chromatids, at Telophase II each daughter cells has how many
chromosomes? - ANSWER10
At G2, there are 40 centrosomes, at Telophase II each daughter cell has how many
chromosomes? - ANSWER20
, Why don't we talk about Gossian genetics? - ANSWERhe was not quantitative with
his work
What is the alternative form of a gene? - ANSWERallele
How many different alleles can a diploid individual have at a single gene locus if
there are 4 alleles in the population? - ANSWER2 alleles
True or False: Recessive alleles are not expressed because they code for an
inactive or defective enzyme. - ANSWERtrue
What is an example of a genotype? - ANSWERPP, Pp, or pp
In genetics, what determines what? - ANSWERgenotype determines phenotype
An individual with 2 Barr Bodies has how many chromosomes? - ANSWER3: 2 are
inactive, 1 is active
X chromosome inactivation happens how? - ANSWERrandom and all but one
Calico and tortoiseshell cats are examples of... - ANSWERX chromosome
inactivation
Could an Rh+ man be the father of an Rh- child? - ANSWERyes
If both parents are carriers for sickle cell anemia, what is the percent of their children
that will have the disease? - ANSWER25%
Why is the sickle allele maintained in populations, particularly in Africa and the
Mediterranean Sea area? - ANSWERHeterozygotes are immune to Malaria
Does testing newborns for diseases save money? - ANSWERyes
How much does it cost to test your child in the state of LA? - ANSWER$30
True or False: In an autosomal recessive trait, if two affected individuals have
offspring then all of their children will have the trait. - ANSWERtrue
True or False: In mitosis it does not matter if you have unpaired chromosomes. -
ANSWERtrue
How many barr bodies are there in the nucleus of a Turner's female cell? -
ANSWER0
Turner's female, XO, 45 is n example of... - ANSWERaneuploidy
How many barr bodies in the preceding Klinefelters male (XXXXY)? - ANSWER3
A Klinefelters male, XXY 47, is an example of... - ANSWERaneuploidy
