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WorksheetsGenetics- Unit 2 7th grade Science
Total questions: 44
Worksheet time: 31mins
Name
Class
Date
1.
The end of meiosis results in
a)
2 cells that are identical.
b)
4 cells that are identical.
c)
2 cells that are not identical.
d)
4 cells that are not identical.
2.
The end of mitosis results in
a)
2 cells that are identical
b)
4 cells that are identical
c)
2 cells that are not identical
d)
4 cells that are not identical
3.
____________________ are used to make predictions about the genotypes and phenotypes of offspring.
a)
Dominant Squares
b)
Punnett Grids
c)
Punnett Squares
d)
Recessive Squares
4.
What is Bb
a)
Homozygous
b)
Heterozygous
c)
Recessive
d)
Dominant
5.
What is bb
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive
d)
Genes
6.
The set of genes for an inherited trait in an organism is called _________.
a)
Mesotype
b)
Phenotype
c)
Teletype
d)
Genotype
7.
the physical traits of an organism
a)
Teletype
b)
Genotype
c)
Mesotype
d)
Phenotype
8.
Genes always appear in pairs. Your parents donate ________ gene for every trait.
a)
1
b)
2
c)
23
d)
46
9.
A _________________ gene shows its trait whenever present.
a)
Dominant
b)
Recessive
c)
Heterozygous
d)
Homozygous
10.
With __________________ gene, you must have 2 of them for the trait to show
a)
Recessive
b)
Dominant
c)
Homozygous
d)
Heterozygous
11.
The passing of DNA from parents to offspring
a)
Generation
b)
Heredity
c)
Inheritance
d)
Traits
12.
The Genetic Code for all living things
a)
ABC
b)
RNA
c)
NBC
d)
DNA
13.
This means Same Gene
a)
Dominant
b)
Recessive
c)
Heterozygous
d)
Homozygous
14.
This means Different Gene
a)
Dominant
b)
Recessive
c)
Homozygous
d)
Heterozygous
15.
What are the two genotypes that show the DOMINANT Phenotype
a)
GG, gg
b)
GG, Gg
c)
Gg, gg
16.
What is the only Genotype that shows the RECESSIVE Phenotype?
a)
GG
b)
Gg
c)
gg
17.
Phenotype is to physical as Genotype is to
a)
gene
b)
physical
c)
trait
d)
dna
18.
Dominant is to strong as Recessive is to
a)
weak
b)
powerful
c)
gene
d)
homozygous
19.
What does heterozygous mean?
a)
Two alleles that are the SAME
b)
Two alleles that are DIFFERENT
20.
What is a factor that is covered up by another trait?
a)
Recessive
b)
Dominant
21.
What is a factor that covers up another trait?
a)
Recessive
b)
Dominate
22.
The expressed form of a trait.
a)
homozygous
b)
heterozygous
c)
recessive
d)
dominant
23.
The expressed form of a gene. (The genetic make-up.)
a)
genotype
b)
phenotype
c)
recessive
d)
dominant
24.
The physical appearance of a trait.
a)
phenotype
b)
genotype
c)
codominance
d)
monodominant
25.
What type of reproduction creates clones?
a)
sexual
b)
asexual
26.
How much of your DNA do you receive from your mother?
a)
25%
b)
50%
c)
75%
d)
100%
27.
If T=Tall and t=short, and my genotype if Tt, what is my phenotype?
a)
tall
b)
short
c)
dwarf
d)
medium height
28.
Which type of reproduction creates genetically different offspring?
a)
sexual
b)
asexual
29.
If you are a boy, what percent of your genes did you get from your dad?
a)
25%
b)
50%
c)
75%
d)
100%
30.
Which type of reproduction requires two parents?
a)
sexual reproduction
b)
asexual reproduction
31.
Which type of reproduction requires only one parent?
a)
sexual reproduction
b)
asexual reproduction
32.
The production of a new organism from two parents
a)
Sexual Reproduction
b)
Asexual Reproduction
c)
Vegetative Propagation
d)
Fertilization
33.
The production of a new organism from a single parent
a)
Sexual Reproduction
b)
Vegetative Propagation
c)
Fertilization
d)
Asexual Reproduction
34.
The joining of egg and sperm outside the females body
a)
External Fertilization
b)
Internal Fertilization
c)
Metamorphosis
d)
Larva
35.
The joining of egg and sperm inside the females body
a)
External Fertilization
b)
Internal Fertilization
c)
Nymph
d)
Larva
36.
The passing down of traits from parents to its offspring
a)
Hand-me-down cloths
b)
Recycling
c)
Heredity
d)
Gene
37.
Which of the following is an acceptable statement about asexual reproduction?
a)
Asexual reproduction is two parents that create an offspring that is identical to the parents
b)
Asexual reproduction is one parent that produces an offspring that has similar characteristics as the parent
c)
Asexual reproduction occurs when the sex cells of the parents unite
d)
Asexual reproduction is one parent that creates an offspring that is identical to it
38.
An advantage of sexual reproduction is ______
a)
less energy needed
b)
variation in offspring
c)
no variation in offspring
d)
more energy needed
39.
What is an advantage of asexual reproduction
a)
variation of offspring
b)
no variation of offspring
c)
less energy needed
d)
more energy needed
40.
One disadvantage of sexual reproduction is ____
a)
more energy needed
b)
less energy needed
c)
clone of parents
d)
variation of offspring
41.
What is a disadvantage of asexual reproduction?
a)
variation in offspring
b)
more energy required
c)
less energy required
d)
clone of offspring
42.
A is tall
a is short
What are the phenotype of this gene combination?
a is short
What are the phenotype of this gene combination?
a)
Aa, aa
b)
Only short
c)
Tall and Short
d)
Only tall
43.
B represents Brown eyes
b represents blue eyes
What are the possible genotypes of the offspring?
b represents blue eyes
What are the possible genotypes of the offspring?
a)
Bb, bb
b)
BB
c)
bb
d)
brown and blue eyes
44.
What is the probability of having a child with blue eyes?
B = Brown
b = blue
B = Brown
b = blue
a)
75%
b)
50%
c)
100%
d)
25%
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