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Meiosis is a type of cell division that produces:
Zygotes
Gametes
Chromosomes
DNA
Brown eyes are dominant to blue eyes. Assuming two heterozygous individuals are crossed together, what phenotype ratio would we expect from the offspring?
75% blue, 25% brown
100% brown
75% brown, 25% blue
50% brown, 50% blue
When does non-disjunction of chromosomes occur regarding chromosome disorders?
The cell cycle
Mitosis
Meiosis
Cell growth
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%
75%
25%
50%
What type of mutation causes down syndrome?
Non-disjunction in chromosome 21.
An extra Y chromosome.
A point mutation in chromosome 21.
Non-disjunction in chromosome 23.
What happens during a silent mutation?
An amino acid is changed.
No amino acids are changed.
A stop codon is produced.
All amino acids are changed after that mutation.
What type and how many cells are produced in meiosis?
Four haploid cells
two diploid cells
four diploid cells
two haploid cells
A gene that is found on the X chromosome is a...
Dominant trait
Mendellian trait
Recessive trait
Sex-linked gene
The point where RNA polymerase binds and transcription takes place is in which part of the lac operon?
CAP site
Promotor
lacz,x,y
Operator
Which of the following are frameshift mutations?
deletions
Deletions and insertions
insertions
Substitutions and deletions
How many cells and what type are produced in Meiosis phase I?
Two genetically different haploid cells.
Two genetically identical diploid cells.
Two genetically different diploid cells.
Two genetically identical haploid cells.
What ratio of the offspring will be carriers given a homozygous dominant and a heterozygous parent?
1/4
1/2
1/3
What are the symptoms of the inherited disorder, hemophilia?
Stunted/slowed limb growth.
Inability to distinguish between red and green.
Blood that is unable to clot after injury.
Abnormal redblood cell shape.
Which structure is required for the lac operon?
All of these.
CAP site
Operator
Promotor
In which phases do the spindle fibers form during meiosis?
Metaphase I and II
Metaphase II
Proshpase I
Prophase I and II
Four' o' clock flowers come in three colours: Red, white (homozygous) and pink (heterozygous). What type of inheritance is this?
Multiple alleles
Polygenic inheritance
Incomplete dominance
Codominance
