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1.
Meiosis
Which cells in an organism are haploid?
2.
What does it mean being haploid?
3.
Which cells in the organism are diploid?
4.
What does it mean being diploid?
5.
Which cells undergo meiosis?
6.
How many cells are there in the beginning of meiosis?
7.
How many cells are there in the end of meiosis?
8.
9.
Draw a short diagram of meiosis. Indicate which cell is
Draw the diagram of formation of zygote from two gametes.
diploid, which is haploid.
Indicate chromosomes, which cell is diploid / haploid
In meiosis which step is responsible for genetic variation? _____________________________________________
10.
Genetics
Define the term “dominant”
11.
Define the term “recessive”
12.
Define the term “homozygous”
13.
Define the term “heterozygous”
14.
Which set of chromosomes determines sex? Female _______ Male__________
15.
State the law of independent assortment.
16.
State the law of segregation.
17.
Evolution
Define mutation
18.
Which process is responsible that new traits occasionally show up in the population?
19.
Why is genetic variation important?
20.
What ensures that at least some individuals will survive in the changed environment
Low level / medium level / high level of genetic diversity in the population
Define the concept of biological species.
21.
22.
Scientific method
Differneciate between hypothesis and theory
Hypothesis
Theory
23.
Problems
Unfertilized egg or sperm cell is diploid
24.
If unfertilized egg has 10 chromosomes how many chromosomes will be in the skin cell? Explain
25.
The organism has the following alleles Aa Bb. Genes A
and B are located on different chromosomes. During
meiosis alleles “A” and “a” go to the opposite sides of the
dividing nucleus. Where will allele B go?
/ haploid
Explain
26. In the pea plant the allele for wrinkle skin (F) is dominant to the
allele for smooth skin (f) what is the probability of appearing
smooth-skinned offspring? Draw Punnet square
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35.
A man inherits dominant allele for the trait from father and recessive allele from mother.
Determine the genotype of this man. Assign letter A or a for the trait
What trait will this man express? Which alleles will his sperm cell contain?
How can lethal disease that is caused by recessive allele continue to occur in the population? Draw the Punnett square to solve this
problem. Hint. Are parents heterozygous or homozygous? __________________________________________________________
A flock of birds was released into the wild. Which will determine the likelihood that an individual fish will survive? GENOTYPE
or PHENOTYPE
A scientist was trying to breed plants with only red flowers. For many generations he allowed only red plants to self-pollinate.
Almost all of the offspring had entirely red flowers, but about one in a thousand offspring had yellow flowers.
Explain which process is responsible for this event.
In a species of fish, a recessive allele codes for a condition that always causes offspring to die before they can reproduce.
Which of the crosses would allow this recessive allele to remain in the populationl?
Draw Punnett squares for all possible combination to solve this problem.
An unfavorable condition occurred in a particular environment. While some species became extinct, some species were able to
survive. Explain which factor is responsible for this?
A disease is determined by a recessive allele. Which combination of alleles will determine the normal phenotype and survival rate?
Draw Punnett squares for all possible combination to solve this problem
There are 4 types of blood that are determined by the
following genotypes.
Blood type
Genotype
A
AA or AO
B
BB or BO
AB
AB
O
OO
The table shows the possible alleles for three traits that
could occur in the gametes from one mother and one
father
Egg
Sperm
Is it possible that parents with blood types A and B could have a child
with blood type O ? If yes, explain how.
. Which set of alleles for an offspring will be least likely ? Explain why.
AaBbCc
AaBbCC
ABC
AbC
abC
aBC
ABc
Abc
abc
aBc
AABbcc
AaBBcc
36.
A person inherited from the mother alleles B,D, E and H. And from the father alleles b, d, e, and h.
Genes E and H are located on the same chromosome. Genes B and D are each on different chromosomes.
Which sets of alleles most likely are found in the gametes of this person?
Hint 1: If E and H are located on the same chromosome which alleles will be located on the homologous chromosome?
Hint 2: If the alleles are located on the same chromosome, can they separate to different gametes?
Written response. Write in complete sentences.
37.
In an isolated population of fish the ability to jump over the obstruction is determined by a gene. The obstruction was formed over
the river. Originally all the fishes were not able to jump over the barrier. Although no fishes immigrated into the population, some
fishes began to appear in later generations that were able to jump over the obstruction. These fishes were better able to find meals
and avoid predators and are now more numerous than the fishes that are not able to overcome the obstruction.
 Name the process by which the new trait originated.
 Name and explain the process by which the new trait became most common in the population
 Describe how the variation between individuals in the coloration can be beneficial in this fish population.
38.
Define genetic drift and which population it affects most.
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