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