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Instructions: Answer all questions to get your test result.
1) In guinea pigs black fur (B) is dominant over gray (b). Two black pigs are mated. One is homozygous and one is heterozygous. What is the percentage of GRAY offpring?
A
50%
B
25%
C
0%
D
75%
2) In mussels the brown allele (B) is dominant over blue (b). In which cross will ALL tthe offspring be brown?
A
BB x bb
B
Bb x Bb
C
Bb x bb
D
bb x bb
3) In tomato plants, red (R) fruit color dominates yellow (r). Use the Punnett square to determine the phenotypes.
A
all red
B
all yellow
C
all orange
D
most are red, some are yellow
4) If both mother and father are HOMOZYGOUS dominant for brown eyes, what is the chance that their child would be born with blue eyes?
A
75%
B
0%
C
25%
D
50%
5) The masked or hidden trait is called
A
shy
B
dominant
C
recessive
6) If an alien is heterozygous for blue hair, then her genotype is
A
bb
B
Bb
C
BB
7) If a creature is homozygous for green fingernails, then his genotype would be
A
gg
B
Yy
C
Gg
8) Diversity of species refers to the idea that
A
Organisms can be classified
B
there are many different types of organisms.
C
organisms of the same species share the same species name.
D
not every individual in a species is identical
9) Which of these could cause the extinction of a species?
A
environmental change
B
disease
C
loss of food source
D
all of the above
10) A paleontologist is most likely to study
A
fossils
B
viruses
C
drug treatments
D
dog breeding
11) A population of birds eats green moths. Every so often the green moths have a brown offspring. The brown moths are easier to see and are less likely to survive. This is called:
A
mutation
B
evidence
C
variation
D
natural selection
12) There are green and brown moths in the forest. The brown moths are seen more quickly and are eaten by the birds. Green moths survive in the forest because:
A
none of the above
B
both a and b
C
they fly faster than brown moths.
D
their coloring makes them better adapted to the forest than brown moths
13) Which trait provides genetic variation in a flower population?
A
Flowers that have been cut
B
Flowers that have been dyed blue
C
Flowers with twice the normal number of petals
D
None of the above
14) A man lifts weights and exercises until he is very muscular. He works out with the hope that his children will also be strong. A problem with his idea is that
A
characteristics acquired during one's lifetime cannot be passed to offspring.
B
They will be strong later in life, but not as babies.
C
not all offspring may want to be that strong.
D
no problem. The statement is true.
15) Which of these could describe a mutation?
A
striped cats have striped offspring
B
long beaked birds having long beaked offspring
C
beige worms have beige offspring
D
hornless cows have calves with horns.
*select an answer for all questions
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