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Meiosis is a type of cell division that produces:
Zygotes
Chromosomes
Gametes
DNA
Brown eyes are dominant to blue eyes. Assuming two heterozygous individuals are crossed together, what phenotype ratio would we expect from the offspring?
50% brown, 50% blue
75% brown, 25% blue
75% blue, 25% brown
100% brown
When does non-disjunction of chromosomes occur regarding chromosome disorders?
The cell cycle
Mitosis
Cell growth
Meiosis
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?
50%
75%
25%
0%
What type of mutation causes down syndrome?
Non-disjunction in chromosome 23.
Non-disjunction in chromosome 21.
An extra Y chromosome.
A point mutation in chromosome 21.
What happens during a silent mutation?
A stop codon is produced.
An amino acid is changed.
All amino acids are changed after that mutation.
No amino acids are changed.
What type and how many cells are produced in meiosis?
two haploid cells
two diploid cells
Four haploid cells
four diploid cells
A gene that is found on the X chromosome is a...
Mendellian trait
Recessive trait
Sex-linked gene
Dominant trait
The point where RNA polymerase binds and transcription takes place is in which part of the lac operon?
Promotor
Operator
CAP site
lacz,x,y
Which of the following are frameshift mutations?
Substitutions and deletions
deletions
insertions
Deletions and insertions
How many cells and what type are produced in Meiosis phase I?
Two genetically different haploid cells.
Two genetically different diploid cells.
Two genetically identical diploid cells.
Two genetically identical haploid cells.
What ratio of the offspring will be carriers given a homozygous dominant and a heterozygous parent?
1/2
1/3
1/4
What are the symptoms of the inherited disorder, hemophilia?
Inability to distinguish between red and green.
Abnormal redblood cell shape.
Blood that is unable to clot after injury.
Stunted/slowed limb growth.
Which structure is required for the lac operon?
CAP site
Promotor
Operator
All of these.
In which phases do the spindle fibers form during meiosis?
Metaphase II
Metaphase I and 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
Codominance
Incomplete dominance
