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Dominant and Recessive
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Created by
Szymon Lis
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Cards (20)
What is a gene?
A segment of
DNA
coding for a
protein
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What determines the characteristics that organisms develop?
Inherited
genes
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What does a gene code for?
A particular type of
protein
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What are different codes for multiple forms of the same protein called?
Alleles
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What is an allele?
A different version of the same
gene
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How many copies of each gene do we have?
Two
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Why do we have two copies of each gene?
One from each
parent
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What does it mean to be homozygous for an allele?
Having two of the
same
allele
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What does it mean to be heterozygous for an allele?
Having two
different
alleles
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If an organism is heterozygous and one allele is dominant, which allele gets expressed?
The
dominant
allele
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What determines a characteristic like height?
Several different
genes
interacting
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How can a recessive allele be expressed in an organism's phenotype?
When the organism is
homozygous recessive
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When will a dominant allele be expressed?
When
heterozygous
or
homozygous
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What is a genotype?
The entire collection of
alleles
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What is a phenotype?
The characteristics from the
genotype
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Can organisms with different genotypes have the same phenotype?
Yes, if the
dominant allele
is present
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How do genotype and phenotype differ?
Genotype is
genetic
code, phenotype characteristics
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Why does a homozygous recessive mouse have a different phenotype than a heterozygous mouse with a dominant purple allele?
Because it has a different
genotype
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What determines traits?
Genes
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What trait in mites is determined by a single gene?
Fur color
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