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Meiosis is a type of cell division that produces:
Gametes
Zygotes
DNA
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
100% brown
75% brown, 25% blue
When does non-disjunction of chromosomes occur regarding chromosome disorders?
Mitosis
The cell cycle
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?
50%
0%
25%
75%
What type of mutation causes down syndrome?
An extra Y chromosome.
Non-disjunction in chromosome 21.
Non-disjunction in chromosome 23.
A point mutation in chromosome 21.
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...
Recessive trait
Dominant trait
Mendellian trait
Sex-linked gene
The point where RNA polymerase binds and transcription takes place is in which part of the lac operon?
Operator
CAP site
Promotor
lacz,x,y
Which of the following are frameshift mutations?
Deletions and insertions
Substitutions and deletions
deletions
insertions
How many cells and what type are produced in Meiosis phase I?
Two genetically different diploid cells.
Two genetically identical haploid cells.
Two genetically identical diploid cells.
Two genetically different haploid cells.
What ratio of the offspring will be carriers given a homozygous dominant and a heterozygous parent?
1/3
1/2
1/4
What are the symptoms of the inherited disorder, hemophilia?
Stunted/slowed limb growth.
Blood that is unable to clot after injury.
Abnormal redblood cell shape.
Inability to distinguish between red and green.
Which structure is required for the lac operon?
Promotor
CAP site
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?
Codominance
Incomplete dominance
Multiple alleles
Polygenic inheritance
