Ch 7, 6th Grade Question Preview (ID: 41940)
Genetics.
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A section of DNA that has genetic info for one trait
a) gene
b) allele
c) chromosone
d) DNA
An adaptation that helps a species blend in with its natural surroundings
a) camouflage
b) mimicry
c) alleles
d) inheritance
How a trait appears or is expressed
a) genotype
b) phenotype
c) appearotype
d) chromotype
A permanent change in the sequence of DNA in a gene
a) adaptation
b) variation
c) mutation
d) differentiation
An adaptation in which one species looks like another species
a) camouflage
b) mimicry
c) adaptation
d) prints
Where is DNA located?
a) in chromosomes
b) in genes
c) only in reproductive cells
d) in plants and fish only
Why do organisms have pairs of chromosomes?
a) 2 is better than 1
b) in case 1 is damaged, the other will do the duties of both
c) the egg and sperm each give a half set of chromosomes
d) organisms only have 1 chromosome
Humans have ___ chromosomes.
a) 23
b) 46
c) 12
d) 96
A gene for a single trait is called a(n)
a) chromosomes
b) genotype
c) phenotype
d) allele
The process that creates sperm or egg cells
a) mitosis
b) meiosis
c) photosynthesis
d) cellular respiration
When a sperm and egg join, ___ occurs.
a) pollination
b) asexual reproduction
c) fertilization
d) none of the above
T/F: Most mutations occur randomly.
a) true
b) false
c)
d)
What can happen because of mutation?
a) the organism can be helped
b) the organism can be harmed
c) nothing
d) all of the above
Variations occur through
a) mutatios
b) asexual reproduction
c) skills picked up in an organism's lifetime
d) none of the above
In selective breeding, what chooses which traits are passed down?
a) Mother Nature
b) the parents
c) humans
d) bacteria
The ability of an organism to keep its internal conditions within certain limits
a) metabolism
b) photosynthesis
c) mutualism
d) homeostasis
A biochemical change that enables a species to increase survival or maintain homeostasis
a) structural adaptation
b) behavioral adaptation
c) functional adaptation
d) none of the above
T/F: A parrot picking up a ball and putting it in a basketball net is an inherited trait
a) true
b) false
c)
d)
The offspring created through asexual reproduction is
a) genetically identical to the parent
b) similar to the parent
c) nothing like the parent
d)
An organism's complete set of genes is its
a) genotype
b) phenotype
c) chromosomes
d) allele
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