BIOLOGY 1201 EXAM 3 2026 ASSESSMENT
SCRIPT QUESTION BANK DETAILED RESPONSES
◉ Why don't we talk about Gossian genetics?
Answer: he was not quantitative with his work
◉ What is the alternative form of a gene?
Answer: allele
◉ How many different alleles can a diploid individual have at a
single gene locus if there are 4 alleles in the population?
Answer: 2 alleles
◉ True or False: Recessive alleles are not expressed because they
code for an inactive or defective enzyme.
Answer: true
◉ What is an example of a genotype?
Answer: PP, Pp, or pp
◉ In genetics, what determines what?
Answer: genotype determines phenotype
,◉ An individual with 2 Barr Bodies has how many chromosomes?
Answer: 3: 2 are inactive, 1 is active
◉ X chromosome inactivation happens how?
Answer: random and all but one
◉ Calico and tortoiseshell cats are examples of...
Answer: X chromosome inactivation
◉ Could an Rh+ man be the father of an Rh- child?
Answer: yes
◉ If both parents are carriers for sickle cell anemia, what is the
percent of their children that will have the disease?
Answer: 25%
◉ Why is the sickle allele maintained in populations, particularly in
Africa and the Mediterranean Sea area?
Answer: Heterozygotes are immune to Malaria
◉ Does testing newborns for diseases save money?
, Answer: yes
◉ 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.
Answer: true
◉ True or False: In mitosis it does not matter if you have unpaired
chromosomes.
Answer: true
◉ How many barr bodies are there in the nucleus of a Turner's
female cell?
Answer: 0
◉ Turner's female, XO, 45 is n example of...
Answer: aneuploidy
◉ How many barr bodies in the preceding Klinefelters male
(XXXXY)?
SCRIPT QUESTION BANK DETAILED RESPONSES
◉ Why don't we talk about Gossian genetics?
Answer: he was not quantitative with his work
◉ What is the alternative form of a gene?
Answer: allele
◉ How many different alleles can a diploid individual have at a
single gene locus if there are 4 alleles in the population?
Answer: 2 alleles
◉ True or False: Recessive alleles are not expressed because they
code for an inactive or defective enzyme.
Answer: true
◉ What is an example of a genotype?
Answer: PP, Pp, or pp
◉ In genetics, what determines what?
Answer: genotype determines phenotype
,◉ An individual with 2 Barr Bodies has how many chromosomes?
Answer: 3: 2 are inactive, 1 is active
◉ X chromosome inactivation happens how?
Answer: random and all but one
◉ Calico and tortoiseshell cats are examples of...
Answer: X chromosome inactivation
◉ Could an Rh+ man be the father of an Rh- child?
Answer: yes
◉ If both parents are carriers for sickle cell anemia, what is the
percent of their children that will have the disease?
Answer: 25%
◉ Why is the sickle allele maintained in populations, particularly in
Africa and the Mediterranean Sea area?
Answer: Heterozygotes are immune to Malaria
◉ Does testing newborns for diseases save money?
, Answer: yes
◉ 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.
Answer: true
◉ True or False: In mitosis it does not matter if you have unpaired
chromosomes.
Answer: true
◉ How many barr bodies are there in the nucleus of a Turner's
female cell?
Answer: 0
◉ Turner's female, XO, 45 is n example of...
Answer: aneuploidy
◉ How many barr bodies in the preceding Klinefelters male
(XXXXY)?
