DNA and Chromosomes
Inheritance
Probability, Punnett Squares and Pedigrees
Reproduction & Fetal Development
Meiosis
100
The building blocks of DNA are called.
Nucleotides
100
A(n) _________ is an alternate version of a gene
allele
100
The missing genotype is:
aa
100
Binary fission is an example of what type of reproduction
asexual
100
When does DNA replication take place
Interphase
200
The number of chromosomes that are found in human sperm cells
23
200
_____________________ alleles show their effect even if the individual only has one copy of the allele
dominant
200
What are the genotypic and phenotypic ratios shown in the problem below:
Genotypic Ratio: Bb= 50%, bb = 50%
Phenotypic Ratio: Undeterminable (not enough information)
200
Human pregnancy can be divided into ____
trimesters
200
What holds the chromosomes together
centromeres
300
A mutation in the genetic code where ATG becomes AG is called
Deletion (Point mutation)
300
What inheritance pattern is shown below
Incomplete Dominance
300
Being freckled or not (F or f) follows the autosomal dominant mode of transmission. Affected individuals are freckled and shaded in the pedigree. According the the pedigree shown below the genotype of individual I-2 is:
Ff
300
When gametes join together in fertilization they produce ___________
zygotes or a zygote
300
When cytokinesis is completed in meiosis it produces ____ haploid cells
4
400
This syndrome can be detected by karyotype only
Trisomy X or Triple X
400
Blood types are an example of what types of inheritance patterns 
Multiple Alleles and Codominance
400
Determine the genotypes of the parents crossed in the problem below:
RrYy x RRyy
400
____________________ chromosomes:
(a) have the same chromosome number (ex. both are chromosome #4)
(b) contain the same genes/control the same traits
Homologous
400
When do chromosomes line up in a single file?
Metaphase 2
500
Draw the structure of a DNA molecule
500
Skin colour is inherited through multiple genes. This inheritance pattern is called.
Polygenic inheritance
500
The trait being passed down below follows what inheritance pattern?
X linked Dominant (all daughters of affected fathers have it)
500
In human fetal development the brain and spinal cord begin forming in the ____________ trimester
first
500
What step of meiosis is shown below
Prophase 2