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Meiosis is a type of cell division that produces:
Zygotes
DNA
Gametes
Chromosomes
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
50% brown, 50% blue
75% brown, 25% blue
100% brown
When does non-disjunction of chromosomes occur regarding chromosome disorders?
Meiosis
Cell growth
The cell cycle
Mitosis
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?
25%
75%
50%
0%
What type of mutation causes down syndrome?
Non-disjunction in chromosome 21.
A point mutation in chromosome 21.
Non-disjunction in chromosome 23.
An extra Y chromosome.
What happens during a silent mutation?
A stop codon is produced.
An amino acid is changed.
No amino acids are changed.
All amino acids are changed after that mutation.
What type and how many cells are produced in meiosis?
two diploid cells
two haploid cells
four diploid cells
Four haploid cells
A gene that is found on the X chromosome is a...
Recessive trait
Dominant trait
Sex-linked gene
Mendellian trait
The point where RNA polymerase binds and transcription takes place is in which part of the lac operon?
lacz,x,y
Operator
CAP site
Promotor
Which of the following are frameshift mutations?
Substitutions and deletions
deletions
Deletions and insertions
insertions
How many cells and what type are produced in Meiosis phase I?
Two genetically identical haploid cells.
Two genetically different haploid cells.
Two genetically identical diploid cells.
Two genetically different diploid 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?
Inability to distinguish between red and green.
Blood that is unable to clot after injury.
Stunted/slowed limb growth.
Abnormal redblood cell shape.
Which structure is required for the lac operon?
Promotor
Operator
All of these.
CAP site
In which phases do the spindle fibers form during meiosis?
Proshpase I
Prophase I and II
Metaphase I and II
Metaphase II
Four' o' clock flowers come in three colours: Red, white (homozygous) and pink (heterozygous). What type of inheritance is this?
Multiple alleles
Incomplete dominance
Codominance
Polygenic inheritance
