Share Genetics revision
Save to Folder
Meiosis is a type of cell division that produces:
DNA
Zygotes
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?
100% brown
75% blue, 25% brown
75% brown, 25% blue
50% brown, 50% blue
When does non-disjunction of chromosomes occur regarding chromosome disorders?
Cell growth
Meiosis
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%
0%
50%
What type of mutation causes down syndrome?
A point mutation in chromosome 21.
An extra Y chromosome.
Non-disjunction in chromosome 23.
Non-disjunction in chromosome 21.
What happens during a silent mutation?
No amino acids are changed.
All amino acids are changed after that mutation.
An amino acid is changed.
A stop codon is produced.
What type and how many cells are produced in meiosis?
two haploid cells
four diploid cells
two diploid cells
Four 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?
lacz,x,y
Promotor
Operator
CAP site
Which of the following are frameshift mutations?
Substitutions and deletions
insertions
Deletions and insertions
deletions
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?
1/3
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?
CAP site
All of these.
Promotor
Operator
In which phases do the spindle fibers form during meiosis?
Metaphase I and II
Proshpase I
Prophase 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?
Incomplete dominance
Codominance
Multiple alleles
Polygenic inheritance
