Name__________________
Date___________________
Period_________________
Applied Genetics Unit Review
1. A gene is a segment of DNA___ that codes for a _____Protien_______ which causes a
trait to be expressed.
2. a. What is the degree of genetic similarity between cloned organisms?
100%... genetically identical
b. How can humans have the same degree of genetic similarity …Naturally?
Identical twins
3. An organism has 50,000 thousand genes. How would you express this number in
scientific notation?
5.0x 104
4-7 refer to diagram and information below
A jewelry store was robbed overnight. At the scene of the crime investigators found a stain of
blood on the carpet where evidently the burglar had cut them self on broken glass during the
robbery. A DNA sample was taken from four possible suspects and a DNA fingerprint was
compared with that of the DNA from the crime scene.
Wells where micropipette is
used to insert DNA sample
I
II
III
VI
V
4. Name the process that produces this type of DNA fingerprint.
Gel electrophoresis
5. a. Which DNA fragment is the shortest? Which is the longest?
VI is the shortest I is the longest
b. How do you know the longest from the shortest DNA fragment?
The longest fragments are at the top of the gel because they get stuck more easily but the shortest
fragments move easily through the gel and they are close to the bottom
6. Which Suspect has DNA most similar to the DNA found at the crime
scene?
john
7.
How can a scientist confirm the results found from a DNA fingerprint?
Repeat testing to confirm accurate result
8. Name the process of inserting a gene from one organism into another
Organism.
Transformation (recombinant DNA)
9. What property of DNA allows genes from one organism to be
successfully inserted in to another organism?
DNA is UNIVERSAL
10. a. What is a transgenic food?
A food the contains genes from a different organism
b. name 2 pros and 2 cons of transgenic foods
pros

produce better crops for more food

medicinal foods

better tasting food

decrease use of pesticides on crops


Cons
Potentially dangerous
allergic reactions to
food
Possible environmental
problems
c. True/ false
Humans can get harmful transgenic traits by eating transgenic foods.
false
11. Sex-linked recessive traits occur most often when passed from __MOTHER___to __SON___.
12. Only ________Females_________can be carriers of sex-linked traits.
13. What is the genotype and phenotype for the pedigree symbols shown below for
colorblindness, a sex-linked disorder.
B= not colorblind
b=colorblind
Genotype
__XbXb_
_____XBy____
____XBXb___
____XbY___
Not colorblind
colorblind
____XBXB___
Phenotype
colorblind
Not colorblind
not colorblind
13. The man and woman depicted in the pedigree below want to have children. The woman is a
carrier of a sex-linked disorder and the man is not affected.
A= Dominant
a= recessive
?
?
a. What is the genotype of the man and the woman
Woman = XBXb
man = XBY
b. Cross the parents in a punnet square what are the possible genotypes and
phenotypes?
XB
Xb
XB
Y
C. What is the probability that the child will inherit the disorder?
What is the probability that the child will- not inherit the disorder?
Over all there is a 25 % chance that their child will get the disorder. The couple cannot
have any females with eh disorder because the fathers X has the dominant trait so
daughters may be carriers. If the couple has a son then there is a50 % chance the boy will
have the disorder because the mother is a carrier