1. The father of genetics is_____. A. Charles Darwin B. Gregor Mendel C. James Watson D. Albert Einstein

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1. The father of genetics is_____. A.
Charles Darwin B. Gregor Mendel
C. James Watson D. Albert Einstein
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3. Mendel studied the inheritance of ___________
in the garden pea. A. seed size
B. seed color C. flower size
D. all of the above
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5. According to the blending theory of
inheritance, a cross between plants with red
flowers and plants with white flowers wouldyield
only _____. A. plants with red flowers
B. plants with white flowers
C. plants with red and white flowers D.
plants with pink flowers
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7. Mendel's experiments are as applicable today
as they were in 1860 due to _____. A.
his careful experimental design B. his
use of statistics to interpret his results
C. his careful records of the numbers of
offspring that expressed each characteristic
D. all of the above
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8. Mendel's true-breeding pea plants were created
by _____. A. self-pollination
B. cross-pollination
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12. When an organism has two different alleles at
a gene locus, it is referred to as _____.
A. homozygous recessive B.
homozygous dominant C. heterozygous
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13. The allele that is expressed in a
heterozygous organism is the _____ allele.
A. dominant B. recessive
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14. The word __________ refers to the alleles an
individual receives at fertilization.
A. genotype B. phenotype C.
allotype D. lenotype
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15. Which of the following is a phenotype?
A. Tt B. heterozygous C.
short D. T
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16. When Mendel crossed a true-breeding tall
plant with a true-breeding short plant the
offspring were _____. A. 100 tall
B. 50 tall, 50 short C. 100
medium
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17. The product of a cross between two different
strains that differ in regard to only one trait
is known as a _____. A. true-breeding
organism B. hybrid C.
dihybrid D. homozygous organism
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19. When Mendel crossed the hybrids (F1
generation) _____. A. all the plants
were tall B. all the plants were medium
height C. 3/4 of the plants were tall,
1/4 of the plants were short
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20. Mendel's law of segregation states _____.
A. parents of contrasting appearance
produce offspring of intermediate appearance
B. factors for each trait separate during
gamete formation C. organisms have two
factors for each trait D. both B and C
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21. A cross between two hybrids results in a
_____ phenotypic ratio. A. 9331
B. 121 C. 31 D.
1111
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23. Each physical trait is controlled by _____
allele(s). A. one B. two
C. three D. four
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24. Mendel's true-breeding short plants in the P
generation were _____. A. homozygous
recessive B. homozygous dominant
C. heterozygous
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25. There is only one allele for each trait in
the gametes because _____. A. each
organism has only one allele for each trait
B. the homologous chromosomes separate during
meiosis I C. mitosis reduces the number
of chromosomes when gametes are formed
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26. The recessive phenotype is displayed by
organisms which are _____. A.
homozygous dominant B. homozygous
recessive C. heterozygous
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27. Which of the following represents a
heterozygous genotype? A. TT
B. Tt C. tt D. tall
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28. Each gamete has only one allele for each
trait because gametes are always _____.
A. haploid B. diploid
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29. A heterozygous (for one trait) organism can
produce ______. A. only one type of
gamete B. two types of gametes
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30. Which of the following gametes would Mendel's
true-breeding tall plants in the P generation
have produced? A. T B. T or t
C. t
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34. If a person is heterozygous for unattached
earlobes, their genotype must be _____.
A. EE B. Ee C. ee
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35. Which of the following represents a type of
gamete? A. Tt B. TT
C. t D. tt
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39. Mendel relied heavily on his knowledge of
____ to interpret the results of his experiments.
A. anatomy B. microbiology
C. statistics D. physics
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40. The probable results of a genetic cross can
be determined by using _____. A. a
Punnett square B. the laws of
probability C. both A and B
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42. If yellow seed color is dominant over green
seed color in pea plants, we could use _____ to
represent a homozygousdominant yellow seed
producing plant. A. Y B. y
C. YY D. Yy
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44. Mendel crossed his F1 generation tall plants
with true-breeding, short plants. The results
were a __________ phenotypicratio. A.
11 B. 21 C. 31
D. 41
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45. If an individual with the dominant phenotype
is crossed with an individual with the recessive
phenotype and all the offspringhave the dominant
phenotype, it would be concluded that the
individual with the dominant phenotype is _____.
A. homozygous dominant B.
heterozygous
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48. If the chance of E 1/2 and the chance of e
1/2, then the chance of Ee _____.
A. 1/2 B. 1/4
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49. E unattached earlobes. e attached
earlobes. In the cross of Ee and Ee, the chance
of a child with unattached earlobesis _____.
A. 1/2 B. 1/4 C. 3/4
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51. The mother can roll her tongue (dominant
phenotype), but her child cannot (recessive
phenotype). The mother's phenotypemust be _____.
A. TT B. Tt C. tt
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52. A mother and child can roll their tongues
(dominant phenotype), but the father cannot
(recessive phenotype). The child'sphenotype must
be _____. A. TT B. Tt
C. tt
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53. If two flies heterozygous for wing length and
body color are crossed, which of the following
are possible results? A. chance of L,
long wings 3/4 B. chance of l, short
wings 1/2 C. Chance of G, grey body
1/4 D. all of the above are true
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54. A cross in which true-breeding plants differ
in two traits is known as a __________ cross.
A. test B. dihybrid C.
multi trait D. hybrid
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55. Which is a mutant characteristic in fruit
flies? A. gray body B. black
body C. long wings
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56. How many different types of gametes can a fly
with the genotype LlGg produce? A. one
B. two C. three D.
four
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57. When two dihybrid organisms are crossed and
simple dominance is present in both genes a _____
phenotypic ratio willresult. A. 121
B. 31 C. 9331
D. 1111
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58. If we represent fruit fly traits with the
following letters L long wings, l short
wings, G gray body, g black body, thenan
organism with the genotype LLGg will _____.
A. have long wings and a gray body
B. have long wings and a black body C.
have short wings and a gray body D.
have short wings and a black body
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59. The organism with the genotype LLGg will
produce _____ type(s) of gamete(s). A.
one B. two C. three
D. four
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60. If the chance of having long wings is 3/4 and
the chance of having a black body is 1/4, then
the chance of having longwings and a black body
are _____. A. 9/16 B. 4/16
C. 3/16 D. 1/16
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61. If the chance of having short wings and a
black body is 1/16 and the chance of having short
wings is 1/4, then the chanceof having a black
body must be _____. A. 1/4
B. 3/4 C. 1/12
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62. Which of the following types of gametes is
not produced by an organism with the genotype
LLGg? A. LG B. lG
C. Lg
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65. In dihybrid genetics problems, the individual
has _____ allele(s). A. one
B. two C. three D. four
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66. If we find the genotype of an individual to
be AABbcc, we've examined alleles for _____
trait(s). A. one B. two
C. three D. four
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68. Which of the following genotypes represents
an organism that is homozygous recessive for two
traits? A. lg B. Llgg
C. llgg D. LLGG
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72. If the parents are heterozygous for cystic
fibrosis (Ff x Ff), then each offspring has a
_____ chance of having cysticfibrosis.
A. 2 B. 25 C. 50
D. 75
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73. Selective breeding can be used to produce
_____. A. crops with higher yields
B. sheep with thicker coats C.
chickens that lay larger eggs D. all of
the above
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74. To determine whether an individual is
homozygous dominant or heterozygous for either of
two traits a cross with anindividual with a
_____ genotype could be done. A. LLGG
B. LlGg C. llgg D.
llGG
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75. If an organism that is homozygous dominant
for two traits is crossed with an organism that
is homozygous recessive forthe same two traits,
the offspring will _____. A. all have
the dominant phenotype for both traits
B. have a 9331 phenotypic ratio C.
have a 1111 phenotypic ratio D. have
a 11 phenotypic ratio
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76. Which of the following is a gamete?
A. LLGg B. Gg C. Lg
D. llgg
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78. If plants with tall stems and green pods are
dominant to plants with short stems and yellow
pods, a cross between twoplants heterozygous for
each trait will yield _____ short plants with
green pods. A. one B. three
C. six D. nine
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