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
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
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)
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
1 min
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