WorksheetsGenetics 7th grade
Total questions: 30
Worksheet time: 10mins
Name
Class
Date
1.
Humans have ___ chromosomes in their normal body cells. They received __ from their mother and __ from their father
a)
46, 23, 23
b)
92, 46, 46
c)
48, 24, 24
d)
1--, 50, 50
2.
The genes make-up of an organism is referred to as its ___, which are the alleles that are inherited from the parent.
a)
genotype
b)
karotype
c)
heterotype
d)
phenotype
3.
Anything in the environment to which an organism reacts
a)
insight
b)
instinct
c)
response
d)
stimulus
4.
When an organism has two different alleles coding for a single trait it is
a)
heredity
b)
homozygous
c)
dominant
d)
heterozygous
5.
Gregor Mendel studied heredity using ___ plants
a)
rose
b)
maize
c)
tundra
d)
pea
6.
Which of the following is an example of courtship behavior?
a)
Peacock spreading out its feathers
b)
song birds sending out sounds
c)
releasing pheromones
d)
all of the above
7.
An automatic response to a stimuli is called a ____
a)
hormones
b)
learned response
c)
diurnal
d)
reflex
8.
If an allele for a particular trait is not expressed at all when another allele for the trait is present, the allele is
a)
recessive
b)
hybrid
c)
dominant
d)
incomplete dominance
9.
If two different alleles for a trait are present and one allele doesn't entirely block the expression of the other, the genetic situation is called
a)
incomplete dominance
b)
codominance
c)
recessive
d)
purebred
10.
A type of learned behavior where animals form an attachment to other animals or locations
a)
hibernation
b)
migration
c)
imprinting
d)
reflex
11.
If an allele for a particular trait masks another allele for that trait, the allele is
a)
incomplete dominance
b)
mutated
c)
recessive
d)
dominant
12.
__ occurs when two different alleles act as dominant alleles. They are both expressed or appear in the phenotype.
a)
Incomplete Dominance
b)
Complete Dominance
c)
Codominance/Multiple Alleles
d)
Recessive Trait
13.
A person tries different pieces until one fits the puzzle
a)
trial and error
b)
insight
c)
imprinting
d)
conditioning
14.
Chemicals produced by one animal that influences the behavior of another animal of the same species are called
a)
pheromones
b)
instincts
c)
agressors
d)
bio-luminescence
15.
Web-spinning by a spider and mating by a stickleback fish are examples of
a)
reflexes
b)
instincts
c)
learned behaviors
d)
conditioning
16.
The Rafflesia plant has a fleshy appearance and foul odor similar to rotting meat; it has been called the corpse flower.
a)
Appearance and smell attracts decay insects (flies) that help pollinate the plant
b)
Appearance/smell keep pollinating insects away
c)
Appearance and smell attract honey bees to pollinate plant
d)
Appearance/smell keeps birds away
17.
In plant species that pollinate using the wind, the pollen grains must be
a)
large and heavy
b)
small and light
c)
bright and sweet-smelling
d)
all of these
18.
What happens to the seeds of a blackberry plant after the fruit is eaten by an animal?
a)
Seeds are ruined and won't grow
b)
Seeds will be deposited in animal's waste and grow new plants
c)
Seeds will begin to grow inside of animal
d)
Seeds will change shape and become new species of plant
19.
An animal that is active during the day and sleeps at night is said to be
a)
nocturnal
b)
diurnal
c)
homeostasis
d)
equiturnal
20.
A dog barks twice for a bone
a)
innate
b)
learned
21.
Speaking English
a)
innate
b)
learned
22.
The pupil of a cat's eye increases in size in dim light
a)
innate
b)
learned
23.
A person rides a bicycle
a)
innate
b)
learned
24.
Birds fly south for the winter
a)
innate
b)
learned
25.
Occurs when individuals receive two recessive genes that results in the build up of mucus and it also affects the pancreas
a)
hemophilia
b)
colorblindness
c)
cystic fibrosis
d)
down syndrome
26.
Also called trisonmy 21; individuals receive an extra chromosome on the 21st pair.
a)
hemophilia
b)
colorblindness
c)
cystic fibrosis
d)
down syndrome
27.
The specific trait that you would see that results from the alleles present
a)
karotype
b)
mutation
c)
phenotype
d)
genotype
28.
sex-linked disorder; individuals cannot pick out the difference between color
a)
hemophilia
b)
colorblindness
c)
cystic fibrosis
d)
down syndrome
29.
___ are more likely to have sex-linked disorders because they only have one X chromosome
a)
females
b)
males
30.
sex-linked disorder; individuals have trouble with bleeding because the blood does not clot
a)
hemophilia
b)
colorblindness
c)
cystic fibrosis
d)
down syndrom
100 %
