8th Grade Science Chapter 2 Review Question Preview (ID: 52496)
Traits And How They Change.
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what is the term used for the different forms of a gene
a) phenotypes
b) genotypes
c) genetics
d) alleles
what is a trait called that appears only when both alleles are present
a) dominant
b) recessive
c) genetic
d) alleles
which is a sequence of DNA that directs a cell to make protein
a) chromosome
b) gene
c) nucleus
d) recessive
what is the study of heredity called
a) genetics
b) enviromental
c) by evolution
d) natural selection
which would not be evidence of evolution
a) similar structures in two different species
b) variations in a species in two environments
c) a bird that is the same in two different areas of its range
d) a species that can avoid a predator
what is the production of several species from one ancestral species called
a) adaptive radiation
b) heredity
c) extinction
d) phenotype
what results in the formation of new alleles
a) mutation
b) dominant
c) genetics
d) recessive
which is not a way that humans influence the rate of species extinction
a) mining
b) farming
c) volcanic eruptions
d) construction
the mechanism of evolution is
a) extinction
b) mutation
c) natural selction
d) evolution
any feature of an organism that is inherited is a
a) trait
b) allele
c) gene
d) chromosome
the visible product of a gene and enviromental influences is
a) genotype
b) genetics
c) phenotype
d) mutation
if a parent has the genotype CcBB, how many different sex cells wil be produced
a) 2
b) 4
c) 1
d) 7
for which did Darwin propose natural selection as an explanation
a) selective breeding
b) evolution
c) predation
d) mutation
any feature of an organism that is inherited.
a) trait
b) allele
c) genes
d) genotype
the visible product of a gene and the environments influences is a
a) genotype
b) phenotype
c) dominant
d) recessive
an alternate form of a gene is a
a) mutation
b) genetics
c) allele
d) evolution
________ is the result of the death of the last member of a species.
a) evolution
b) natural selection
c) adaptive radiaton
d) extinction
the study of heredity
a) genetics
b) biology
c) life science
d) genes
the survival of the fittest
a) evolution
b) extinction
c) natural selection
d) alleles
a model used to predict the offspring of known genotypes
a) genetics
b) punnett square
c) mendel
d) darwin
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