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Ch 7, 6th Grade
Test Description: Genetics
Instructions: Answer all questions to get your test result.
1) A section of DNA that has genetic info for one trait
A
DNA
B
gene
C
allele
D
chromosone
2) An adaptation that helps a species blend in with its natural surroundings
A
alleles
B
inheritance
C
mimicry
D
camouflage
3) How a trait appears or is expressed
A
phenotype
B
genotype
C
chromotype
D
appearotype
4) A permanent change in the sequence of DNA in a gene
A
variation
B
adaptation
C
differentiation
D
mutation
5) An adaptation in which one species looks like another species
A
camouflage
B
prints
C
mimicry
D
adaptation
6) Where is DNA located?
A
in chromosomes
B
in genes
C
only in reproductive cells
D
in plants and fish only
7) Why do organisms have pairs of chromosomes?
A
in case 1 is damaged, the other will do the duties of both
B
organisms only have 1 chromosome
C
the egg and sperm each give a half set of chromosomes
D
2 is better than 1
8) Humans have ___ chromosomes.
A
23
B
46
C
12
D
96
9) A gene for a single trait is called a(n)
A
chromosomes
B
phenotype
C
genotype
D
allele
10) The process that creates sperm or egg cells
A
photosynthesis
B
mitosis
C
meiosis
D
cellular respiration
11) When a sperm and egg join, ___ occurs.
A
asexual reproduction
B
none of the above
C
pollination
D
fertilization
12) T/F: Most mutations occur randomly.
A
true
B
false
13) What can happen because of mutation?
A
nothing
B
all of the above
C
the organism can be helped
D
the organism can be harmed
14) Variations occur through
A
asexual reproduction
B
mutatios
C
none of the above
D
skills picked up in an organism's lifetime
15) In selective breeding, what chooses which traits are passed down?
A
bacteria
B
humans
C
the parents
D
Mother Nature
16) The ability of an organism to keep its internal conditions within certain limits
A
mutualism
B
metabolism
C
photosynthesis
D
homeostasis
17) A biochemical change that enables a species to increase survival or maintain homeostasis
A
functional adaptation
B
none of the above
C
behavioral adaptation
D
structural adaptation
18) T/F: A parrot picking up a ball and putting it in a basketball net is an inherited trait
A
false
B
true
19) The offspring created through asexual reproduction is
A
genetically identical to the parent
B
nothing like the parent
C
similar to the parent
20) An organism's complete set of genes is its
A
chromosomes
B
phenotype
C
genotype
D
allele
*select an answer for all questions
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