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A male with the AB bloodtype is crossed with a female of a O bloodtype, what are the potential phenotypes of the offspring?
 
Bloodtypes A and B.
 
Bloodtypes AO and BO
 
Bloodtypes AB, OO
 
Bloodtypes AB, A, B, and O
Which of these genetic disorders can have a positive effect in certain environments?
 
Sickle-cell anemia
 
Malaria
 
Hemophilia
 
Down syndrome
What best describes the mutation in the picture?
 
Substitution, missense.
 
Substitution, nonsense.
 
Substitution, silent.
 
Insertion, frameshift.
Which of the following mutations will likely have the smallest effect on an organism?
 
Gene substitution
 
Gene deletion
 
Gene insertion
 
Chromosomal duplication
Which of the following mutations will have the largest effect on an organism?
 
Non-disjunction of a chromosome pair
 
Chromosomal duplication
 
Gene substitution
 
gene deletion
In which scenario is a 4x4 punnet square needed?
 
Dihybrid cross
 
Monohybrid cross
 
Sex-linked cross
 
Polygenic cross
Which of the following is an example of a neutal mutation for the affected species?
 
Redhair
 
Albinism
 
Dwarfism
 
HIV resistance in humans
Which of the following is an example of a positive mutation for the affected species?
 
Antibiotic resistance in bacteria.
 
Birthmarks
 
Albinism
 
Down syndrome
A male with an extra X chromosome has what genetic condition?
 
Klinefelters syndrome
 
Jacobs syndrome
 
Turners syndrome
 
Down syndrome
When does a nonsense mutation occurs?
 
When a mutation produces a premature stop codon.
 
When a mutation produces a frameshift mutation.
 
When a mutation produces no visible effect.
 
When a protein is changed by a mutation.
A point mutation occurs when...
 
A single base is changed?
 
A small piece of chromosome is changed.
 
When a insertion occurs.
 
When a frameshift mutation occurs.
Under what conditions is the lactose digesting enzyme produced in a species with the lac operon?
 
Glucose absent, lactose present.
 
Glucose present, lactose present.
 
Glucose present, lactose absent.
 
Glucose absent, lactose absent.
Red-green colour blindness is sex-linked reccessive. A carrier female is crossed with a normal male, what percentage of offspring will have colour blindness?
 
25%
 
0%
 
50%
 
75%
Diabetes has been found to be inherited (in some cases) through a recessive allele. What is the chance that a heterozygous father and a diabetic mother will have a diabetic child?
 
50%
 
100%
 
25%
 
0%
What is the correct definition of inheritance?
 
The passing down of traits from parent to offspring.
 
The traits of each generation.
 
The phenotypes of offspring.
 
The phenotypes of parant generations.
What is the function of the lac operon?
 
It is responsible for producing lactose digesting enzymes.
 
It is responsible for produced glucose digesting enzymes.
 
it is responsible for producing lactose.
 
None of these options.
Which is true regarding meiosis and mitosis?
 
In meiosis, chromosomes crossover and exchange material.
 
Meiosis only has one phase.
 
In the anaphase, chromosomes are arranged in the equator.
 
Gametes are produced by mitosis.
Which mutation of these mutations can create a very big change in the final protein produced?
 
All of these
 
Insertions
 
Deletions
 
Substitutions
Which of these strucures is not found in the operon structure?
 
Receiver
 
Promoter
 
Operator
 
CAP site
The picture attached is an example of what kind of inheritance?
 
Codominance
 
Incomplete dominance
 
Multiple alleles
 
Polygenic inheritance
Four' o' clock flowers come in three colours: Red, white (homozygous) and pink (heterozygous). What type of inheritance is this?
 
Incomplete dominance
 
Codominance
 
Polygenic inheritance
 
Multiple alleles
In which phases do the spindle fibers form during meiosis?
 
Prophase I and II
 
Proshpase I
 
Metaphase I and II
 
Metaphase II
Which structure is required for the lac operon?
 
All of these.
 
Operator
 
Promotor
 
CAP site
What are the symptoms of the inherited disorder, hemophilia?
 
Blood that is unable to clot after injury.
 
Inability to distinguish between red and green.
 
Stunted/slowed limb growth.
 
Abnormal redblood cell shape.
What ratio of the offspring will be carriers given a homozygous dominant and a heterozygous parent?
 
1/2
 
1/4
 
1/3
How many cells and what type are produced in Meiosis phase I?
 
Two genetically different diploid cells.
 
Two genetically different haploid cells.
 
Two genetically identical diploid cells.
 
Two genetically identical haploid cells.
Which of the following are frameshift mutations?
 
Deletions and insertions
 
deletions
 
insertions
 
Substitutions and deletions
The point where RNA polymerase binds and transcription takes place is in which part of the lac operon?
 
Promotor
 
CAP site
 
Operator
 
lacz,x,y
A gene that is found on the X chromosome is a...
 
Sex-linked gene
 
Dominant trait
 
Recessive trait
 
Mendellian trait
What type and how many cells are produced in meiosis?
 
Four haploid cells
 
two haploid cells
 
four diploid cells
 
two diploid cells
What happens during a silent mutation?
 
No amino acids are changed.
 
An amino acid is changed.
 
A stop codon is produced.
 
All amino acids are changed after that mutation.
What type of mutation causes down syndrome?
 
Non-disjunction in chromosome 21.
 
Non-disjunction in chromosome 23.
 
An extra Y chromosome.
 
A point mutation in chromosome 21.
In fruit flies, red eyes are dominant to white eyes. If a homozygous dominant fly is crossed with a homozygous recessive fly, what percentage of the offspring would have white eyes?
 
0%
 
25%
 
50%
 
75%
When does non-disjunction of chromosomes occur regarding chromosome disorders?
 
Meiosis
 
Mitosis
 
The cell cycle
 
Cell growth
Brown eyes are dominant to blue eyes. Assuming two heterozygous individuals are crossed together, what phenotype ratio would we expect from the offspring?
 
75% brown, 25% blue
 
50% brown, 50% blue
 
100% brown
 
75% blue, 25% brown
Meiosis is a type of cell division that produces:
 
Gametes
 
DNA
 
Chromosomes
 
Zygotes


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