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Review Questions
Start with the white board
A= Big noses
a= small noses
What genotypes could give you a big
nose?
BB or Bb
What genotypes would give you a small nose?
bb
Give the phenotype for someone who is a hybrid.
Bb= BIG NOSE
A= Big noses
What is the phenotypic
ratio?
3:1
What is the genotypic
ratio?
1:2:1
a= small noses
A= Big noses
a= small noses
Cross a heterozygous big nose parent with a
homozygous recessive parent.
What percent of the children would have small noses?
50 %
Gerald is heterozygous for his
little ears and meets Tammy who
has humungous ears.
What is the dominant phenotype?
Little Ears
What is Tammy’s genotype?
ee homozygous recessive
What are the chances of the two having offspring with HUGE
ears?
50%
In fruit flies, red eyes (R) are
dominant over white eyes (r).
• If you crossed a homozygous dominant with
a heterozygous fly. What percent would
have white eyes?
What would be
the genotypic
ratio?
R
r
2:2:0
R
R
RR
RR
Rr
Rr
0% White Eyes
What would be
the phenotypic
ratio?
4:0
If Red flowers are incompletely
dominant to white flowers,
Show the cross between a pink and a white
flower.
R
What percent of the
flowers would have
red petals?
r
r
Rr
rr
r
Rr
rr
0 % are red
What is the phenotypic
ratio?
2: 2: 0
Quick Question!
The combination of alleles an
organism inherits for a particular
Genotype
trait is called it’s ___________
Genotype in which an organism
inherits two of the same alleles is
Homozygous
called __________
Genes occupy a specific location
Chromosomes
on _____________
Who is the “Father of Genetics”?
Gregor Mendel
Any error made in DNA is called
a
Mutation
Where are proteins made?
Ribosomes
Long chains of amino acids make
a __________
Protein
What must be copied before
Mitosis begins?
DNA (replication)
All the cells of the human body
have 46 chromosomes. How
many would be found in a cloned
cell?
46
Where in the cell is DNA
located?
The Nucleus
What is NOT true of DNA
a) It is located in the nucleus
b) It delivers information for making proteins
to the ribosome.
c) It provides instructions for controling cell
activities
d) It is found in all living organisms
e) All of these are true
Genes are located on
_____________________.
Chromosomes
A DNA molecule is made up of
__________________, which
have three parts.
Nucleotides
Nucleotides are made up of
________________,
_______________, and
__________________.
5-Carbon sugar, Phosphate
group, and a Nitrogen Base
Which bases pair up with each
other in DNA?
Adenine=Thymine
Cytosine=Guanine
The process of copying a DNA
strand is called
_____________________.
Replication
1.
ATT
Make a complimentary
DNA strand:
GCG
CAA
GTA
TGA
ATT
TAA
GCG
CGC
CAA
G TT
GTA
TGA
CAT
ACT
Since DNA cannot leave the nucleus,
__________ copies the DNA code and
takes this information to the ribosome to
assemble proteins.
mRNA or messenger RNA
RNA contains the same bases as
DNA except Thymine is replaced
with ___________________.
Uracil
Make a complimentary RNA
strand:
TTG ACG AAT CGA TGA
TTG ACG AAT CGA TGA
AAC
UGC
U UA G C U
AC U
Every three bases makes a
________________.
Codon
tRNA matches up with each codon on
the mRNA to make one ___________
____________
Amino Acid
Long chains of amino acids make
____________________.
Proteins
What makes up the backbone
(sides) of a DNA molecule?
Phosphate group and Sugar
$100
Any change in the DNA sequence
is called _____________.
$200
This is an example of what type
of mutation?
Deletion
This is an example of what type
of mutation?
Translocation
$200
Breeding individuals with similar
characteristics
Ex: German Shepard X German Shepard =
German Shepard
Inbreeding
$500
__________ provides the heredity
information for controlling all the
activities in the cell and provides
the blueprints for protein
assembly (making proteins)
DNA
$400
Crossbreeding dissimilar
individuals
Hybridization
$200
Cytosine
Guanine pairs with _______
in a
complimentary DNA strand