BIO 1201 EXAM 3 LSU QUESTIONS &
ELABORATED COMPLETE
SOLUTIONS PASSED 100%
True or False: The purpose of mitosis is to insure that daughter cells have identical
genetic information at the mother cell. - Correct Answer ✔✔ true
How many centromeres are there per chromosome? - Correct Answer ✔✔ 1
How many centrosomes per chromosome consist of 2 sister chromatids? - Correct
Answer ✔✔ 1
When is DNA replicated? - Correct Answer ✔✔ S phase
When are sister chromatids separated? - Correct Answer ✔✔ Anaphase I
If the DNA content in G2 is X, what is the DNA content of each daughter cell at
Telophase? - Correct Answer ✔✔ 0.5X
If the DNA content in G1 is X, what is the DNA content of each of the daughter cells at
Telophase? - Correct Answer ✔✔ X
DNA replication checkpoint occurs where? - Correct Answer ✔✔ G2
We inherit our mitochondria from our... - Correct Answer ✔✔ our mother
In mitosis when do homologous chromosome pairs separate? - Correct Answer ✔✔ in
mitosis, homologous chromosomes do not separate
In meiosis when do homologous chromosome pairs separate? - Correct Answer ✔✔
Anaphase I
At G2, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - Correct Answer ✔✔ 0.25X
At G1, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - Correct Answer ✔✔ 0.5X
At G2 there are 40 chromatids, what is the diploid chromosome number? - Correct
Answer ✔✔ 20
, At G2 there are 40 chromatids, at Telophase II each daughter cells has how many
chromosomes? - Correct Answer ✔✔ 10
At G2, there are 40 centrosomes, at Telophase II each daughter cell has how many
chromosomes? - Correct Answer ✔✔ 20
Why don't we talk about Gossian genetics? - Correct Answer ✔✔ he was not
quantitative with his work
What is the alternative form of a gene? - Correct Answer ✔✔ allele
How many different alleles can a diploid individual have at a single gene locus if there
are 4 alleles in the population? - Correct Answer ✔✔ 2 alleles
True or False: Recessive alleles are not expressed because they code for an inactive or
defective enzyme. - Correct Answer ✔✔ true
What is an example of a genotype? - Correct Answer ✔✔ PP, Pp, or pp
In genetics, what determines what? - Correct Answer ✔✔ genotype determines
phenotype
An individual with 2 Barr Bodies has how many chromosomes? - Correct Answer ✔✔ 3:
2 are inactive, 1 is active
X chromosome inactivation happens how? - Correct Answer ✔✔ random and all but
one
Calico and tortoiseshell cats are examples of... - Correct Answer ✔✔ X chromosome
inactivation
Could an Rh+ man be the father of an Rh- child? - Correct Answer ✔✔ yes
If both parents are carriers for sickle cell anemia, what is the percent of their children
that will have the disease? - Correct Answer ✔✔ 25%
Why is the sickle allele maintained in populations, particularly in Africa and the
Mediterranean Sea area? - Correct Answer ✔✔ Heterozygotes are immune to Malaria
Does testing newborns for diseases save money? - Correct Answer ✔✔ yes
How much does it cost to test your child in the state of LA? - Correct 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. - Correct Answer ✔✔ true
ELABORATED COMPLETE
SOLUTIONS PASSED 100%
True or False: The purpose of mitosis is to insure that daughter cells have identical
genetic information at the mother cell. - Correct Answer ✔✔ true
How many centromeres are there per chromosome? - Correct Answer ✔✔ 1
How many centrosomes per chromosome consist of 2 sister chromatids? - Correct
Answer ✔✔ 1
When is DNA replicated? - Correct Answer ✔✔ S phase
When are sister chromatids separated? - Correct Answer ✔✔ Anaphase I
If the DNA content in G2 is X, what is the DNA content of each daughter cell at
Telophase? - Correct Answer ✔✔ 0.5X
If the DNA content in G1 is X, what is the DNA content of each of the daughter cells at
Telophase? - Correct Answer ✔✔ X
DNA replication checkpoint occurs where? - Correct Answer ✔✔ G2
We inherit our mitochondria from our... - Correct Answer ✔✔ our mother
In mitosis when do homologous chromosome pairs separate? - Correct Answer ✔✔ in
mitosis, homologous chromosomes do not separate
In meiosis when do homologous chromosome pairs separate? - Correct Answer ✔✔
Anaphase I
At G2, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - Correct Answer ✔✔ 0.25X
At G1, the amount of DNA is X. At Telophase II the amount of DNA in each of the
daughter cells is... - Correct Answer ✔✔ 0.5X
At G2 there are 40 chromatids, what is the diploid chromosome number? - Correct
Answer ✔✔ 20
, At G2 there are 40 chromatids, at Telophase II each daughter cells has how many
chromosomes? - Correct Answer ✔✔ 10
At G2, there are 40 centrosomes, at Telophase II each daughter cell has how many
chromosomes? - Correct Answer ✔✔ 20
Why don't we talk about Gossian genetics? - Correct Answer ✔✔ he was not
quantitative with his work
What is the alternative form of a gene? - Correct Answer ✔✔ allele
How many different alleles can a diploid individual have at a single gene locus if there
are 4 alleles in the population? - Correct Answer ✔✔ 2 alleles
True or False: Recessive alleles are not expressed because they code for an inactive or
defective enzyme. - Correct Answer ✔✔ true
What is an example of a genotype? - Correct Answer ✔✔ PP, Pp, or pp
In genetics, what determines what? - Correct Answer ✔✔ genotype determines
phenotype
An individual with 2 Barr Bodies has how many chromosomes? - Correct Answer ✔✔ 3:
2 are inactive, 1 is active
X chromosome inactivation happens how? - Correct Answer ✔✔ random and all but
one
Calico and tortoiseshell cats are examples of... - Correct Answer ✔✔ X chromosome
inactivation
Could an Rh+ man be the father of an Rh- child? - Correct Answer ✔✔ yes
If both parents are carriers for sickle cell anemia, what is the percent of their children
that will have the disease? - Correct Answer ✔✔ 25%
Why is the sickle allele maintained in populations, particularly in Africa and the
Mediterranean Sea area? - Correct Answer ✔✔ Heterozygotes are immune to Malaria
Does testing newborns for diseases save money? - Correct Answer ✔✔ yes
How much does it cost to test your child in the state of LA? - Correct 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. - Correct Answer ✔✔ true
