Download 1. The father of genetics is_____. A. Charles Darwin B

1. The father of genetics is_____.
A. Charles Darwin
B. Gregor Mendel
___
C. James Watson
D. Albert Einstein
3. Mendel studied the inheritance of ___________ in
the garden pea.
A. seed size
B. seed color
C. flower size
D. all of the above
___
5. According to the blending theory of inheritance, a
cross between plants with red flowers and plants
with white flowers would
yield only _____.
A. plants with red flowers
B. plants with white flowers
C. plants with red and white flowers
___
D. plants with pink flowers
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
___
8. Mendel's true-breeding pea plants were created by
_____.
___
A. self-pollination
B. cross-pollination
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
___
13. The allele that is expressed in a heterozygous
organism is the _____ allele.
___
A. dominant
B. recessive
14. The word __________ refers to the alleles an
individual receives at fertilization.
A. genotype
___
B. phenotype
C. allotype
D. lenotype
15. Which of the following is a phenotype?
A. Tt
B. heterozygous
___
C. short
D. T
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
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
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
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
21. A cross between two hybrids results in a _____
phenotypic ratio.
A. 9:3:3:1
B. 1:2:1
___
C. 3:1
D. 1:1:1:1
23. Each physical trait is controlled by _____
allele(s).
A. one
B. two
___
C. three
D. four
24. Mendel's true-breeding short plants in the P
generation were _____.
A. homozygous recessive
___
B. homozygous dominant
C. heterozygous
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
26. The recessive phenotype is displayed by
organisms which are _____.
A. homozygous dominant
___
B. homozygous recessive
C. heterozygous
27. Which of the following represents a
heterozygous genotype?
A. TT
B. Tt
___
C. tt
D. tall
28. Each gamete has only one allele for each trait
because gametes are always _____.
A. haploid
___
B. diploid
29. A heterozygous (for one trait) organism can
produce ______.
A. only one type of gamete
___
B. two types of gametes
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
34. If a person is heterozygous for unattached
earlobes, their genotype must be _____.
A. EE
___
B. Ee
C. ee
35. Which of the following represents a type of
gamete?
A. Tt
B. TT
___
C. t
D. tt
39. Mendel relied heavily on his knowledge of ____
to interpret the results of his experiments.
A. anatomy
B. microbiology
___
C. statistics
D. physics
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
___
42. If yellow seed color is dominant over green seed
color in pea plants, we could use _____ to represent
a homozygous
dominant yellow seed producing plant.
A. Y
B. y
___
C. YY
D. Yy
44. Mendel crossed his F1 generation tall plants with
true-breeding, short plants. The results were a
__________ phenotypic
ratio.
A. 1:1
___
B. 2:1
C. 3:1
D. 4:1
45. If an individual with the dominant phenotype is
crossed with an individual with the recessive
phenotype and all the offspring
have the dominant phenotype, it would be concluded
that the individual with the dominant phenotype is
_____.
___
A. homozygous dominant
B. heterozygous
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
49. E = unattached earlobes. e = attached earlobes. In
the cross of Ee and Ee, the chance of a child with
unattached earlobes
is _____.
A. 1/2
B. 1/4
___
C. 3/4
51. The mother can roll her tongue (dominant
phenotype), but her child cannot (recessive
phenotype). The mother's phenotype
must be _____.
A. TT
B. Tt
___
C. tt
52. A mother and child can roll their tongues
(dominant phenotype), but the father cannot
(recessive phenotype). The child's
phenotype must be _____.
A. TT
B. Tt
___
C. tt
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
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
55. Which is a mutant characteristic in fruit flies?
A. gray body
B. black body
___
C. long wings
56. How many different types of gametes can a fly
with the genotype LlGg produce?
A. one
B. two
C. three
D. four
___
57. When two dihybrid organisms are crossed and
simple dominance is present in both genes a _____
phenotypic ratio will
result.
A. 1:2:1
B. 3:1
C. 9:3:3:1
___
D. 1:1:1:1
58. If we represent fruit fly traits with the following
letters: L = long wings, l = short wings, G = gray
body, g = black body, then
an 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
59. The organism with the genotype LLGg will
produce _____ type(s) of gamete(s).
A. one
B. two
___
C. three
D. four
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 long
wings and a black body are _____.
A. 9/16
B. 4/16
___
C. 3/16
D. 1/16
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 chance
of having a black body must be _____.
A. 1/4
___
B. 3/4
C. 1/12
62. Which of the following types of gametes is not
produced by an organism with the genotype LLGg?
A. LG
B. lG
___
C. Lg
65. In dihybrid genetics problems, the individual has
_____ allele(s).
A. one
B. two
C. three
___
D. four
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
68. Which of the following genotypes represents an
organism that is homozygous recessive for two
traits?
A. lg
B. Llgg
C. llgg
___
D. LLGG
72. If the parents are heterozygous for cystic fibrosis
(Ff x Ff), then each offspring has a _____ chance of
having cystic
fibrosis.
A. 2%
___
B. 25%
C. 50%
D. 75%
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
___
74. To determine whether an individual is
homozygous dominant or heterozygous for either of
two traits a cross with an
individual with a _____ genotype could be done.
A. LLGG
B. LlGg
C. llgg
___
D. llGG
75. If an organism that is homozygous dominant for
two traits is crossed with an organism that is
homozygous recessive for
the same two traits, the offspring will _____.
A. all have the dominant phenotype for both
___
traits
B. have a 9:3:3:1 phenotypic ratio
C. have a 1:1:1:1 phenotypic ratio
D. have a 1:1 phenotypic ratio
76. Which of the following is a gamete?
A. LLGg
B. Gg
C. Lg
___
D. llgg
78. If plants with tall stems and green pods are
dominant to plants with short stems and yellow pods,
a cross between two
plants heterozygous for each trait will yield _____
short plants with green pods.
A. one
B. three
___
C. six
D. nine