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Flackal6691 Shared "Genetics Vocabulary" - 4 Picmonics

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Genetics Vocabulary

Genes and Alleles
A gene is a fragment of DNA that codes for a trait (hair color)
An allele is a form of a gene that codes for a specific characteristic (brown hair)
Half of a child's genes and alleles come from each parent
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1 min
Dominant vs. Recessive
Dominant allele dominates over recessive allele
If both alleles are present the dominant phenotype is expressed
The recessive phenotype is expressed only with two recessive alleles
Examples of dominant characteristics are widow's peak, dark hair, and dark eyes
Examples of recessive characteristics are straight hairline, light hair, and light eyes
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2 mins
Homozygous vs. Heterozygous
Description of Genotypes
Homozygous has 2 of the same allele (AA or aa)
Homozygous dominant is AA
Homozygous Recessive is aa
Heterozygous has 2 different alleles (Aa)
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2 mins
Genotype vs. Phenotype
Genotype is the genetic makeup
Genotype is coded in DNA
Genotype is shown as 2 letters that represent 2 alleles
Genotype is the code for phenotype
Phenotype is physical appearance of organism
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1 min

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Flackal6691 Shared Genetics Vocabulary - 4 Picmonics