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Genetics 2
Test Description: Ms. Visel's Review
Instructions: Answer all questions to get your test result.
1) If black fur is dominant to white, what genotype(s) would give black fur?
A
bbbb
B
BB, Bb
C
BB
D
bb
2) Which is true about a cross between a heterozygous tall plant and a short plant?
A
half will be medium height
B
about half will be tall, half will be short
C
all will be short
D
all will be tall
3) Which is true about a cross between a heterozygous tall plant and a short plant?
A
25% of the plants will be tall
B
50% of the plants will be medium height
C
100% of the plants will be tall
D
50% of the plants will be tall
4) Perform a cross of RRYy with RrYy. How many offspring will have the genotype RrYY?
A
8
B
4
C
2
D
1
5) Perform a cross of RRYy with RrYy. How many of the offspring will have the genotype RRYY?
A
1
B
4
C
2
D
6
6) Organisms with two different alleles for a trait are said to be
A
Homozygous
B
Heterozygous
C
True-Breeding
D
Purebreds
7) A true-breeding tall plant is crossed with a true-breeding short plant. What would we call the F1 generation?
A
Hybrids
B
True-breeding
C
Purebreds
D
Homozygous Dominant
8) Perform a cross of RrYy with RrYy. How many offspring will be round if round is dominant and represented by R?
A
16/16
B
12/16
C
8/16
D
10/16
9) Suppose Green flowers (G) are dominant to white flowers and tallness (T) is dominant to shortness. What would be the phenotype of a flower with the genotype Ggtt
A
white and tall
B
Green and tall
C
white and short
D
Green and short
10) Perform a cross between two homozygous recessive short plants. How many of the plants are expected to be tall?
A
None of them
B
A quarter of them
C
All of them
D
Half of them
*select an answer for all questions
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