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STUDY GUIDE
Recommendations to follow:
1.
Answers are thought to be short in most of the cases
2.
Try as much as you can to connect the terms and understand the association between some of the concepts in order
to get the whole picture about the topic. Memorizing alone can give you probably around a 70/100 in the exam, but
some questions always require connecting two or more ideas to come up with a short and precise answer.
3.
If you understand these review questions you should do fine in the test, questions in the test will variations of the
same themes covered in these questions.
Ch14-15_Genetics (patterns of inheritance)
1. Differentiate between GENE, and ALLELE
2. Explain what the difference is between…
Diploid (2N)
Genotype
Homozygous
Dominant (alleles)
vs. Haploid (N)
vs. Phenotype
vs. Heterozygous
vs. Recessive (alleles)
3. Imagine, you have two cells undergoing cell division, the first cell is undergoing mitosis, and the second
cell is undergoing meiosis. The first cell is going to be a somatic cell of course, while the second one will
be a sex cell. If you could “see” the contents, the inside of the cell, after both process were over, what
differences would you see between them? List ALL you can think of…
4. How many kinds of gametes are possible with the following genotypes
a) Yy
b) DdAA
c) HhDd
d) XAXa
1. What stage and phase of MEIOSIS is related to MENDEL’S LAW OF SEGREGATION? What is intended
then by SEGREGATION?
2. What stage and phase of MEIOSIS is related to MENDEL’S LAW OF INDEPENDENT ASSORTMENT?
What is meant then by INDEPENDENT ASSORTMENT?
5. What are X-LINKED GENES?

What may happen if a heterozygous (Aa) female for the gene of ocular albinism gives birth to a male
baby?
6. Differentiate between INCOMPLETE DOMINANCE and MULTIPLE ALLELES
7. What is POLYGENIC INHERITANCE? Give an example.
8. If a man has a genotype AO for the blood type… what will be the sex cells this person can produce
regarding the blood type?
9. If a man has genotype AO for blood type and genotype Dd for dimples, which are caused by a dominant
allele D, answer the following

What are the genetic traits or characteristics you are considering here?

What are the phenotypes for both traits?

What are the possible sex cells this man will produce?
MCC Biological Principles
Based on work by Dr. Jose Bava
STUDY GUIDE
10. In humans, freckles (F) on the skin show dominant/recessive behavior as indicated by Mendel, if you do
not have freckles you only have the recessive allele f. A man who has freckles marries a woman that does
not have freckles

Do you have enough information to determine the man’s genotype? Explain

Do you have enough information to determine the woman’s genotype? Explain

Ho does your answer change if you are told his mother did not have freckles? Explain
11. Compare the different types of genetics interactions seen during the lab… in all of them only two (2) alleles
are present at the same time in one individuals, each coming from a different parent
Genes in
autosomes or sex
chromosomes?
Number of alleles
in the population
Number of
possible
genotypes
Number of
possible
phenotypes
Mendel
(Dominant/Recessive):
color (puple=P, white=p)
for flowers
Sex-linked: hemophilia (n)
is recessive to normal (N)
blood
Incomplete dominance:
Chickens have genes for
Black and White color in
the feathers
Multiple alleles: Blood
type
MCC Biological Principles
Based on work by Dr. Jose Bava