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WorksheetsGenetics/Mendel Review Quiz
Total questions: 52
Worksheet time: 30mins
Name
Class
Date
1.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
2.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
3.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
4.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
5.
T = tall an t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
both tall and short
d)
neither tall or short
6.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
7.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
8.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
9.
In this punnett square, what is the missing genotype?
a)
AA
b)
AO
c)
AB
d)
BB
10.
R = red and W = white
In the RW genotype = pink
What pattern of inheritance is being shown?
In the RW genotype = pink
What pattern of inheritance is being shown?
a)
dominant/recessive
b)
codomimance
c)
multiple alleles
d)
polygenic inheritance
11.
In the diagram, what is the genotype of the two plants found in the second generation (F1)?
a)
GG
b)
Gg
c)
gg
d)
cannot tell from the data available
12.
In the punnett square shown, what is the genotypes of the two parents?
a)
RW and RR
b)
RW and WW
c)
RR and WW
d)
RW and RR
13.
R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
a)
offspring will be Rr
b)
offspring will be RR
c)
round seeds will be recessive to wrinkled
d)
Wrinkled will be observed in half of offspring
14.
Which statement describes how two organisms may show the same trait, yet have different genotypes for that phenotype?
a)
Both are homozygous for the dominant trait.
b)
One is homozygous dominant, and the other homozygous recessive.
c)
Both are heterozygous for the dominant trait.
d)
One is homozygous dominant and the other heterozygous.
15.
A female guinea pig homozygous dominant for black fur color is mated with a male homozygous for white fur color. In a litter of eight offspring, probability would predict there would be _____.
a)
8 black guinea pigs
b)
4 black and 4 white guinea pigs
c)
2 black, 4 gray, and 2 white guinea pigs
d)
8 white guinea pigs
16.
How many pairs of chromosomes are in your cells?
a)
23
b)
19
c)
12
d)
10
17.
Which of the following alleles is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
18.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
19.
Which of the following alleles is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
20.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
21.
Which of the following is an example of a phenotype:
a)
Aa
b)
an allele
c)
hair color
d)
your genes
22.
Gregor Mendel is known as the:
a)
Father of Genetics
b)
Father of Heredity
c)
Father of Pea Plants
d)
Father of the Punnett Square
23.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
24.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
25.
What is a phenotype?
a)
The expression of a trait; physical appearance.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
26.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
27.
A Heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
28.
What is the genotype for a male human (boy)?
a)
XX
b)
XY
29.
What is the genotype for a female human (girl)?
a)
XX
b)
XY
30.
Mark is a tall, 11 year old boy. He has a scar on his right cheek. He is intelligent and an excellent drummer. Which of his traits did he most likely inherit?
a)
height
b)
the scar
c)
his intelligence
d)
ability to play drums
31.
What characteristic would a child not inherit from parents?
a)
freckles
b)
eye color
c)
hair style
d)
dimples
32.
Two heterozygous (Tt)tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
33.
While paired together during the second division of meiosis, two chromosomes may exchange segments of DNA
a)
True
b)
False
34.
Meiosis produces 4 nuclei that have different chromosome numbers from the parent cell
a)
True
b)
False
35.
The mating of garden-pea plants can be easily controlled because the male and female reproductive parts are enclosed within the same flower
a)
True
b)
False
c)
Frue
36.
Individuals must exhibit a trait in order for it to appear in their offspring
a)
True
b)
False
37.
Meiosis in female animals results in the same number of ova as sperm that were produced by meiosis in the male
a)
True
b)
False
38.
If the offspring of a test cross all have the dominant trait, then the genotype for the individual being tested must be
a)
female
b)
heterozygous
c)
homozygous
d)
male
39.
Two similar chromosomes that you inherit from your parens
a)
sister chromatids
b)
homologous chromosomes
c)
sex chromosomes
d)
homozygous alleles
40.
Meiosis produces cells with how many chromosomes
a)
44
b)
22
c)
46
d)
23
41.
Which of the following cell types is a diploid
a)
ovum
b)
sex cell
c)
somatic cell
d)
gamete
42.
A distinguishing characteristic can be inherited as a(n)
a)
gene
b)
allele
c)
trait
d)
characteristic
43.
Which law states that organisms inherit 2 copies of each gene and donate one to their offspring
a)
law of independent assortment
b)
law of segregation
c)
law of genetic linkage
d)
law of inheritance
44.
Recessive alleles may not be expressed because they are
a)
masked by the dominant allele
b)
the least common allele in the population
c)
the most common allele in the population
d)
less likely to having crossing over
45.
In Mendel's monohybrid cross of a purebred white-flowered plant and a purebred purple-flowered plant, the F1 generation
a)
showed only the dominant trait
b)
showed only the recessive trait
c)
did not receive any recessive alleles
d)
remained purebred
46.
What is the purpose of meiosis
a)
conserves chromosome number, produces genetically identical cells
b)
conserves chromosome number, produces haploid cells
c)
reduces chromosome number, produces diploid cells
d)
reduces chromosome number by half, produces gametes
47.
All the genetic material that makes up an organism
a)
gamete
b)
genome
c)
phenotype
d)
testcross
48.
What was the key factor in the success in Mendel's experiments
a)
He started with plants that were native to the area
b)
He started with several different types of plants
c)
He started with self-pollinating purebred plants
d)
He started with cross-pollinating flowering plants
49.
Which observation of dihybrid crosses led to Mendel's law of independent assortment
a)
Particular individual traits persisted for many generations
b)
Many combinations of traits were always inherited together
c)
Some combinations of traits were not passed onto offspring
d)
The presence of one trait didn't affect the presence of another
50.
Refer to the illustration. The child in box 1 in the Punnett square would
a)
be homozygous for freckles
b)
have an extra freckles chromosome
c)
be heterozygous for freckles
d)
not have freckles
51.
Refer to the illustration. The parents shown in the Punnett square could have children with a genotypic ratio of
a)
4:0
b)
1:2:1
c)
3:1
d)
1:1
52.
Refer to the illustration. Which box in the Punnett square represents a child who does not have freckles
a)
box 1
b)
box 2
c)
box 3
d)
box 4
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