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WorksheetsGenetics Test Extra Credit
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
What is the study of heredity called?
a)
Inheritance
b)
Genetics
c)
Dominant
d)
Recessive
2.
What type of plant did Mendel do the majority of his research on?
a)
Sunflower
b)
Tomato
c)
Pea
d)
Snapdragon
3.
How many alleles do you inherit from each parent?
a)
1
b)
2
c)
23
d)
46
4.
How many chromosomes do you inherit from each parent?
a)
1
b)
2
c)
23
d)
46
5.
The factors that control the traits you express are called _______________. (Sections of DNA)
a)
DNA
b)
Genes
c)
Alleles
d)
Chromosomes
6.
Which of the following genotypes is homozygous dominant?
a)
Aa
b)
aa
c)
AA
d)
AB
7.
Which of the following genotypes is heterozygous?
a)
Aa
b)
AA
c)
aa
8.
If black fur color (B) is dominant in rabbits to white fur color (b), which of the following is the phenotype of a rabbit that has the genotype BB?
a)
Black
b)
White
9.
If short hair (S) is dominant to long hair (s) in cats, what is the genotype of a short haired cat?
a)
SS
b)
Ss
c)
ss
d)
SS or Ss
10.
If you cross two purebreds for plant height (TT x tt), what is the probability of getting tall offspring?
a)
0%
b)
25%
c)
50%
d)
100%
11.
When Mendel crossed two hybrids for plant height (Tt x Tt), what ratio did he always get for the offspring?
a)
0 tall : 4 short
b)
4 tall : 0 short
c)
3 tall : 1 short
d)
1 tall : 3 short
12.
In a genetic cross, all of the offspring have the genotype Bb. What are the genotypes of the two parents in the cross?
a)
BB and Bb
b)
bb and Bb
c)
BB and BB
d)
BB and bb
13.
According to the chromosome theory of inheritance, what are carried from parents to offspring on chromosomes?
a)
Alleles
b)
Genes
c)
Traits
d)
DNA
14.
Human body cells have _______ chromosomes. Human sex cells have ______ chromosomes.
a)
23 , 46
b)
46 , 23
c)
22 , 44
d)
44, 22
15.
Which of the following is NOT an acquired trait?
a)
Language you speak
b)
Playing an instrument
c)
Eye color
d)
Riding a bike
16.
True or False:
The environment has no effect on the way your genes are expressed.
The environment has no effect on the way your genes are expressed.
a)
True
b)
False
17.
Purple flowers are dominant over white flowers in pea plants. If a homozygous purple flower is crossed with a heterozygous purple flower, what is the probability of getting white flowers?
a)
0%
b)
25%
c)
50%
d)
75%
18.
Dogs have 78 chromosomes in each body cell. How many chromosomes are inherited from each sex cell?
a)
78
b)
156
c)
39
d)
34
19.
What goes on the outside of a punnett square?
a)
Parents
b)
Offspring
20.
Look at the following Punnett Square. What is the genotype of Parent 1?
a)
SS
b)
ss
c)
SS or ss
d)
Ss
21.
Look at the Punnett Square. What is the probability of getting white flowers?
a)
0%
b)
25%
c)
50%
d)
75%
22.
According to the Punnett Square, what is the genotype and phenotype of offspring box 1, assuming tall is dominant over short height in plants.
a)
Genotype : Tt
Phenotype : Tall
Phenotype : Tall
b)
Genotype : TT
Phenotype: Tall
Phenotype: Tall
c)
Genotype : TT
Phenotype : short
Phenotype : short
d)
Genotype : tt
Phenotype : Short
Phenotype : Short
23.
In this cross between two purebreds for opposite colors, what is the probability of getting a white guinea pig?
a)
0%
b)
25%
c)
50%
d)
75%
24.
This individual will be a ___________________ for the first trait located on the chromosomes.
a)
Purebred
b)
Hybrid
c)
Codominant
d)
Homozygous
25.
Which allele will always show up if it is present in an organism's genotype?
a)
Dominant
b)
Recessive
26.
What is the recessive form of fur color in these rabbits?
a)
Gray
b)
Tan
27.
What is the probability of inheriting homozygous brown eyes according to this cross?
a)
25%
b)
50%
c)
75%
d)
100%
28.
______________ seeds are dominant while ______________ seeds are recessive
a)
Green , yellow
b)
Yellow, green
29.
What is the probability of inheriting heterozygous gray rabbits, according to this cross?
a)
25%
b)
50%
c)
75%
d)
0%
30.
TT , Tt, and tt represent _____________________.
Tall or short represent _____________________.
Tall or short represent _____________________.
a)
Genotypes , alleles
b)
Alleles, genotypes
c)
Phenotypes , genotypes
d)
Genotypes , phenotypes
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