7th Grade Spring Semester Final Review

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7th Grade Spring Semester Final Review

• Questions by T. Shorter
• Power point by K. Pease

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1. Gregor Medal studied pea plants in his garden
during the 1800s. He is know as the Father
of____________.

• Genetics

http//anthro.palomar.edu/mendel/mendel_1.htm
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2. Draw a circle around all of the heterozygous
genotypes above.

• Cc
• Gg
• Qq
• Dd
• Vv
• Yy
• Jj

Organisms have two alleles for each trait. When
the alleles of a pair are heterozygous, one is
dominant and the other is recessive.
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3. Draw a square around all of the homozygous
genotypes above.

• TT
• zz
• bb
• NN
• HH
• xx
• ee

The gene for seed shape in pea plants exists in
two forms, one form or allele for round seed
shape (R) and the other for wrinkled seed shape
(r). A homozygous plant would contain the
following alleles for seed shape (RR) or (rr).
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4. Explain the difference between dominant and
recessive traits.

• If a dominant and a recessive gene appear
  together (the heterozygous condition), the
  dominant will always win, producing the trait it
  is coded for. The only time a recessive trait
  (such as the one for blond hair) expresses itself
  is when two recessive genes are present

http//science.jrank.org/pages/2988/Genetics-Domin
ant-recessive-traits.html
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5. A cross between a green eyes person and a blue
eyes person produces four blue eyes children.
What is most likely the dominant color?
blue eyes
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6. Capital letters represent ______ alleles in a
genetic cross.

• Dominant

green is dominant
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7.Lowercase letters represent ______alleles in a
genetic code.

• Recessive

white is recessive
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8.Describe the difference between phenotype and
genotype.

• Phenotype physical appearance
• Genotype genetic traits

Phenotype green / white
Genotype GG, Gg, gg
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9. A cross between a green eyed person and a blue
eyed person produces four blue eyed children.
What is the most likely the dominant color?

• Blue

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10. Name the type of reproduction (asexual or
sexual) seen in each of the pictures below.
Asexual
Asexual
Asexual
Sexual
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11. Another term for heterozygous is
_________________.

• Hybrid

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12. Another term for homozygous is
_______________.

• Purebred

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13. Asexual Reproduction involves ______________
parent and results is ____________ offspring.

• One parent
• Identical offspring

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14. Sexual reproduction involves ___________
parents and results in _____________ offspring.

• Two parents
• Genetically diverse

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15. The ______ is an organ in the male
reproductive system that produces gametes (sex
cells) call ____________.

• Testis
• Sperm

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16. The _______ is an organ in the female
reproductive system that produces gametes (sex
cells) called ____________.

• Ovaries
• Eggs

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17. ______ fertilization is a type or
reproduction where eggs cells are fertilized by
sperm outside of the body.

• External Fertilization

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18. In humans the ________ pair of chromosomes
determines the sex of the offspring.

• 23rd pair

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19. Identify the following traits as inherited or
acquired.

• Nose Shape inherited
• Hair color inherited
• Eye color inherited
• Personality inherited
• Scar on Arm acquired
• Skin color inherited
• Attitude acquired
• Curly hair inherited

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20. Describe the difference between heterozygous
and homozygous and give an example of both.
Homozygous means having identical alleles for a
single trait
Heterozygous. Two different genes controlling a
specified inherited trait
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21.If brown eyes are dominant, draw a punnet
square to show how two brown-eyed parents can
have a child with blue eyes. Include genotype
and phenotype.
B
b

• B Dominant for Brown
• b Recessive for Blue
• 25 BB 50Bb 25bb
• 75 Brown 25 Blue

b
B
B
B
B
b
b
b
b
B
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22. Complete the following
B
b

0
BB Bb bb
b
b
B
b
b
50
b
b
B
b
b
50
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23. Observe the length of the trees shadow in
each of the pictures below. Label each picture as
depicting either sunrise, mid day or sunset.
Sun sets in the West Sun Rises in the east. Mid
Day is directly overhead.
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24. Label the season the Northern Hemisphere
would be experiencing in positions A-D below.

• Asummer
• Bfall
• Cwinter
• Dspring

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25. Label the phases of the moon that would be
seen from earth in positions A-D
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26. What causes the changing of seasons on earth?

• While the amount of heat coming from the sun
  stays the same, it is spread over a larger area
  during the winter than during the summer. This is
  due to the earths tilt.

http//christiananswers.net/kids/edn-seasons.html
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27. Which direction does the earth spin on its
axis?

• When viewed from the 'top' or the 'north pole' of
  the Sun, the Earth revolves COUNTER-CLOCKWISE.
• Also, when viewed from above it's own North Pole,
  the Earth rotates counter-clockwise, as well.

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28.What is a renewable resource? List 3 examples

• A natural resource is a renewable resource if it
  is replaced by natural processes at a rate
  comparable or faster than its rate of consumption
  by humans.
• Solar radiation,
• tides,
• winds
• hydroelectricity are perpetual resources that are
  in no danger of a lack of long-term availability.

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29. What is a non-renewable resource? Give 3
examples

• Natural resource, such as coal, oil, or natural
  gas, that takes millions of years to form
  naturally and therefore cannot be replaced once
  it is consumed

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30. What is am inexhaustible resource? List 3
examples

• Inexhaustible resources are resources that will
  never run out. Examples Wind, sun, tides, solar
  energy, geothermal energy.

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31.List the produces

• Plants

Producers
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32. List the decomposers

• Earthworms

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33. List the consumers

• Ant
• Snake
• Lizard
• Hawk
• Coyote

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34. List the carnivores

• Hawk
• Coyote
• Lizards
• Snake

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35. List the herbivores

• Ants

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36. Is this an example of Primary or Secondary
succession? Why?

• Primary Succession

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37.What are pioneer species? List two examples

• Pioneer species are species which colonize
  previously uncolonized land, usually leading to
  ecological succession.

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39.Circle the organisms which contain the most
stored energy from the sun?

• Algae (producer)

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40. Put a triangle around the organisms which
contains the least stored energy from the sun?

• Hawk (tertiary consumer)

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41.It takes the earth ________ to ______ around
the sun.

• 365 ¼ days to revolve

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42. It takes the earth ______ to ________ on its
axis causing __________.

• ________
• rotate
• seasons

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43. It takes the moon ______ to _________ on its
axis and ________ to ________ around the Earth.
Because of this we only see ___________ side of
the moon.
http//brainbites.nasa.gov//one-side-of-moon
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44. Explain the difference between weathering,
erosion, and deposition.

• Weathering is the breaking down of Earth's rocks,
  soils and minerals through direct contact with
  the planet's atmosphere.
• Erosion is the process of weathering and
  transport of solids (sediment, soil, rock and
  other particles) in the natural environment or
  their source and deposits them elsewhere ...
• Deposition refers to the build up of a sediment
  from organically derived matter or chemical
  processes.

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45. Soil erosion is caused when

• Soil erosion is a naturally occurring process on
  all land. The agents of soil erosion are water
  and wind, each contributing a significant amount
  of soil loss each year