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Mendelian Genetics Practice
Mendelian Genetics Practice
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1
In a heterozygous genotype, the phenotype that would show is
AA
dominant
recessive
Aa
2
The principle of segregation refers to the segregation of:
genes
dihybrids
alleles
heterozygous
3
Black fur is dominant to white fur. Which of the following is a HETEROZYGOUS BLACK genotype?
ff
FF
Both Ff & FF
Ff
4
Identify visible phenotypes.
Aa, Bb
straight hair and freckles
curly hair and freckles
tongue roller and widow's peak
5
The 2 alleles you have for a gene make up your
Homozygous
Genotype
Phenotype
Heterozygous
6
Brown eyes are dominant to blue eyes, which of the following is a HOMOZYGOUS BLUE genotype?
bbb
bb
BB
Bb
7
The branch of math that studies probability is
Geometry
Statistics
Algebra
Calculus
8
Heredity is
Genes
Proteins
The inheritance of traits
Alleles
9
The plants that Mendel crossed to make the F
2
generation were the
F2 generation
Parents
P generation
F1 generation
10
Which of the following is heterozygous?
AA
Rr
EE
dd
11
Brown eyes are dominant to blue eyes, which of the following is a heterozygous brown genotype?
bb
Bb
bB
BB
12
If a child is heterozygous, is it possible for a parent to be homozygous?
25%
100%
yes
no
13
A word that means the same as heterozygous is
heterobred
homozygous
purebred
hybrid
14
Recessive phenotypes are visible only if the genotype is
homozygous dominant
heterozygous
pure dominant
homozygous recessive
15
A chemical factor (found in DNA) that controls heredity is called a
DNA
Enzyme
Proteins
Gene
16
If heterozygous parents reproduce the probability that an offspring would be pure recessive is
0%
75%
50%
25%
17
What is the phenotypic ratio of the cross Aa X aa?
1:1
1:2
1:3
18
If a parent is homozygous dominant for a trait, can their child be homozygous recessive ever?
no
100% chance
yes
25% chance
19
A tool used to by genetic students to determine probability in a genetic cross is
rolling a dice
tossing a coin
karyotype
Punnett square
20
Another word to describe heterozygous is ....
mutated
similar
same
different
21
Which of the following is homozygous recessive?
bb
MM
Pp
Ee
22
Which of the following is homozygous dominant?
Gg
Jj
GG
tt
23
The likelihood something will happen is called
Probability
Destiny
Luck
Chance
24
A haploid sex cell is also known as
gamete
dominant
recessive
phenotype
25
The only way someone can display a recessive phenotype is if they are _________ for that trait
Heterozygous
Heterogeneous
Homozygous dominant
Homozygous recessive
26
What is the phenotypic ratio of the cross Aa X Aa?
1:1
1:3
1:2
27
What are the genotypes of the parents if the offspring have a 25% chance of being recessive?
tt x tt
TT x tt
TT x Tt
Tt x Tt
28
How many DIFFERENT gametes can AaBb produce?
1
2
3
4
29
What are the possible genotypes of the offspring from crossing Aa with Aa?
AA and aa
only Aa
Aa and aa
AA, Aa, and aa
30
A way to predict the possible offspring of a cross....
square dance
square root
punnett square
31
Black feathers are dominant to white feathers in chickens. Which genotype would be white?
Bb
bb
Both Bb & bb
BB
32
An organism with two of the same alleles for a specific trait are
hybrid
homozygous
heterozygous
33
Saying a cat has red fur describes its:
genetics
genotype
phenotype
recessive
34
Having two different alleles for the same gene is called
recessive
dominant
heterozygous
homozygous
35
Different forms of a gene are called
Genes
Proteins
Alleles
DNA
36
According to Mendel, some inheritable traits are recessive, the others are
dominant
rare
unusual
linked
37
How many different gametes can AABb produce?
3
4
1
2
38
How many different gametes can AAbb produce?
2
4
1
3
39
A person who inherits a Brown eye allele and a blue eye allele will have brown eyes because of
Principle of Incomplete dominance
Principle of Segregation
Principle of Dominance
Principle of Codominance
40
How many gametes can AABB produce?
4
1
2
3
41
What are the possible genotypes of the offspring from crossing AA with aa?
Aa
aa
AA
42
During meiosis, alleles separate into different sex cells. This shows Mendel's Law of
Segregation
Independent Assortment
Dominance
Recessive
43
A trait that masks the ability for the other trait to be seen in the phenotype....
recessive
dominant
ugly
44
Tall is dominant to short in plants. Which of the following is a HOMOZYGOUS SHORT genotype?
Tt
tt
Both TT & tt
TT
45
Green is dominant to yellow in plants. Which of the following is a HOMOZYGOUS GREEN genotype?
Gg
gg
Both GG & Gg
GG
46
Cross-breeding the P-generation created F
1
plants that were
Homozygous
Pure
Heterozygous
Hybrids
47
How many traits was Mendel analyzing (at a time) in his monohybrid cross experiments?
four
one
two
three
48
The term that mean's self-pollinating
Cross-bred
In-bred
White bread
True-bred
49
Red flowers are dominant to white flowers. Which of the following is a HOMOZYGOUS RED genotype?
RR
Rr
rr
Both RR & Rr
50
Another word to describe homozygous is
same
homo sapien
different
genes