MENDEL, MODERN GENET
HUMAN GENETICS, HERE
1. Directions: Briefly write the definition of the terms below.
Law of Segregation
Law of Independent assortment
Recombinant DNA (rDNA)
FILL IN PRACTICE
1. What does the figure
Explain each step of the process.
What does the
to the right
Explain each step of the process
. Explain the concepts illustrated below.
Good resistance to heat but poor beef.
English Shorthorn Cattle:
Good beef but poor heat resistance.
Santa Gertrudis Cattle:
ahman and English shorthorns; has good heat
resistance and beef.
the concept illustrated below.
history of genetics
ns of heredity. They are (A)
, (C) m
, (D) polygenic traits, and (E)
traits influenced by the environment
Match each of the preceding with the correct passage or figure
_____ The ABO blood group is determined
by three alleles I
, and i.
______ Soil acidity det
color of Hydrangea (flower),
resulting colors range from blue to pink.
Two dominant alleles are expressed at the same time.
Full color (C), white (c), light
) and white with black
nts or a Himalayan (c
). Full color
is dominant to all the other alleles.
Chinchilla is dominant to Himalayan
More than one gene influences a trait.
Intermediate traits are exhibited.
5. Explain how the picture
to the right demonstrates
Mendel’s Law of Independent Assortment.
6. Explain how the picture to the left demonstrates
Mendel’s Law of Segregation.
7. Circle the text below that represents an argument for genetic screening / gene manipula
tion, underline the
There is probably no
force in a society more powerful than the acquisition of information. As modern genetics
probes deeper and deeper into the essence of the human genome, the science of genetics will come to posse
an information base with power and opportunity for use undreamed of only a few years ago.
With great power comes great responsibility
. Genetic intervention techniques such as genetic engineering, human
gene therapy, and genetic screening raise many que
stions. Since these techniques change the flow of information
at the level of molecules, the level of individuals, and at the level of societies it is wise to consider to what extent
we want to apply these technologies and to reflect on what changes we are
seeking. Genetic screening for
disorders for which a successful therapy exists have been in place for many years. All states of the United States
routinely screen newborns for PKU, an inherited disorder for which a carefully monitored diet provides amelio
But the increasing ability to detect the presence of more and more defective genes has re
energized the ongoing
debate about the ethics of diagnosing genetic disorders prenatally, after birth, and in adults. For example, a
disorder such as Alzheime
r's disease which produces no symptoms until it strikes as early as age 45, or in the case of
kidney disease which produces no symptoms until adulthood and even then progresses slowly. This ability to detect
genetic conditions before symptoms arise, suscep
tibility to genetic diseases such as alcoholism, or the ability to
identify carriers of recessively inherited conditions such as cystic fibrosis, poses new challenges to the ethi
frameworks that had previously been established to deal with controversia
l detection programs. One of the
problems posed by recent developments in molecular genetics is the actual definition of what constitutes a
"disease." There is precedent for defining deviations from the statistical norm, such as high blood pressure or obes
The use of genetic
screening by insurance compani
es is a scare for many people.
Knowing you are
susceptible to breast cancer or diabetes would be invaluable to an
looking for ways to screen
out riskier candidates and th
us keep costs down
and profits up.
But, thirty states have already passed laws
prohibiting such screening for jobs and
insurance. Thankfully, because
everyone is susceptible to one d
But will that statement ring true forever?
8. What i
s the chart below called? In this case what is it meant to represent (
Develop a punnet square that could have also been used to advise the parents of the affected children (marked
with a star).
9. Name the
ogy technique to the left
two practical applications for this technology. What is
significant about the bands?
10. Using the figure below identify which is male which is female. What are these diagrams called?
Are they healthy or unhea
lthy people? Explain.
11. Explain how the phenomena of gene linkage conflicts with Mendel’s Law of Independent Assortment?
The diagram below represents a
The letters B
and b represent genes for a certai
These letters also represent
A) genes for sex determination
C) an allelic pair of genes
D) linked genes
The appearance of a recessive trait in offspring of animals most probably indicates that
A) one parent was ho
mozygous dominant and the other parent was hybrid for that trait
B) neither parent carried a recessive gene for that trait
C) both parents carried at least one recessive gene for that trait
D) one parent was homozygous dominant and the other parent was hom
ozygous recessive for that trait
Which technique is used to alter bacteria in such a way that they produce human insulin?
B) DNA replication
C) genetic screening
D) recombinant DNA formation
A human DNA segment was inserted into a bact
erial cell and became incorporated alto the bacterial
DNA. This technique is an example of
A) genetic engineering
C) genetic counseling
D) artificial selection
In many humans, exposing the skin to sunlight over prolonged periods of time resul
ts in the production of
more pigment by the skin cells (tanning). This change in skin color provides evidence that
ultraviolet light can cause mutations
gene action can be influenced by the environment
the inheritance of skin color is an acquired characte
albinism is a recessive characteristic
Two groups of 100 corn seeds were planted in two separate containers of soil and watered regularly.
Group I was grown in light for 4 weeks and group 11 was grown in the dark for 2 weeks and then in the
or 2 weeks. The color of the seedlings was recorded after each 2
week period. Light was the only
variable in the experiment. The results
are summarized in the data tabl
This experiment demonstrates that
A) water and fertilizer are important fo
r seed germination
B) the environment interacts with genes in the expression of an inherited trait
C) the principles of genetics apply only to plants and not to animals
D) heat should have been provided along with carbon dioxide for proper growth