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