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WorksheetsScience trivia
Total questions: 59
Worksheet time: 58mins
What does heterozygous mean?
An organism that has the same genes for a trait (TT or tt)
An organism that has different genes for a trait (Tt)
When neither gene is fully dominant; offspring is a mixture of both
the different forms of a trait (hair color - brown, blonde, red)
The passing of genetic traits from parent to offspring.
heredity
trait
gene
allele
Having two of the same genes for the trait (sometimes called purebred).
homozygous
hetrozygous
protein
chromosome
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
50% tall and 50% short
75% tall and 25% short
100% short
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
W = white hair
w = non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
none
3/4
1/2
all
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele for green seeds. Which of the following terms best describes the allele for yellow seeds?
codominant
recessive
dominant
sex-linked
The inheritance pattern that allows only one trait to show is called _______________ _______________.
complete dominance
co-dominance
incomplete dominance
dominant trait
When an area of a chromatid is exchanged with the matching area of a chromatid of its homologous chromosome, _________________ occurs
crossing over
mutagenesis
hybridization
fertilization
The ________ produced by each parent are shown along the side of a Punnett Square.
zygotes
offspring
gametes
hybrids
A useful device for predicting the possible offspring of crosses between genotypes is the
Law of dominance
Law of independent assorment
Punnett Square
test cross
A couple has two children, both of whom are boys. What is the chance that the parent's next child will be a boy?
0%
25%
50%
75%
The _______________ of an earthquake is the point where rock under stress begins to break or move.
epicenter
focus
Which of the following is an opening through which molten rock and gas leave a volcano?
pipe
magma chamber
crater
vent
What is ocean crust, and bottom layer of continental crust, made of?
basalt
iron and nickle
bath salt
granite
What is the difference between the inner core and outer core?
inner solid metal, outer liquid metal
inner liquid metal, outer solid metal
inner solid metal, outer solid rock
one is yummy and one gets thrown away
Why is inner core and outer core being a different phase important?
creates earth's magnetic fields
makes scientists feel important
same phase would cause earth to spin out of control
prevents subduction of microscopic killer dna into protoplasmic origination region
Why do scientists believe the outer core is liquid?
They cannot pick up S-waves in shadow of core.
They cannot pick up P-waves in shadow of core.
refraction of Love waves
A lava monster leaked the information in a magma bubble belch.
In sea-floor spreading, molten material rises from the mantle and erupts
along the edges of all the continents.
along mid ocean ridges.
in deep ocean trenches.
at the north and south poles.
Most geologists think that the movement of Earth's plates is caused by
conduction.
earthquakes.
convection currents in the mantle.
Earth's magnetic field.
The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle is known as
convection.
continental drift.
subduction.
conduction.
A place where two plates slip past each other, moving in opposite directions, is known as a
transform boundary.
divergent boundary.
convergent boundary.
rift valley.
The average density of one of the continental crusts is 2.8 g/cm3 and the average density of the oceanic crusts is 3.2 g/cm3. If these two plates come together, what could be expected to happen?
Two plates would push apart and form a rift zone.
The oceanic plate would rise up over the continental plate.
The oceanic plate would be pushed under the continental plate.
The two plates would meet head on and rise up to form mountains.
Assume that the total surface area of earth is not changing. If new material is being produced at one plate boundary, what would be happening at another plate boundary?
New material would be added again.
Old crust would be destroyed by subduction.
According to Wegener's hypothesis of continental drift,
Earth's surface is made up of seven major landmasses.
the continents DO NOT move.
Earth is slowly cooling and shrinking.
the continents were once joined together in a single landmass.
What is a phenotype?
The expression of a trait; physical appearance.
Refers to the genetic makeup of an individual.
An organism that has the same genes for a trait (ex. TT or tt).
The passing of traits from parent to offspring.
