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Delve into the world of genetics with this introductory video explaining genes, alleles, phenotypes, and genotypes. Learn about dominant vs. recessive traits and the difference between homozygous and heterozygous combinations in organisms. Explore examples like eye color and blood type to deepen your understanding. Bill Nye's engaging assignment on dominant and recessive traits is included to reinforce learning. Whether completing classwork or seeking to enhance your knowledge, this resource is a foundational tool for genetic education.
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Traits and Genes Intro Video “Girl Your Phenotype is Showing”
Gene vs Allele • Gene: factors that control a trait (segement of DNA) • Examples: • Eye Color • Blood Type • Allele: different forms of a gene • Examples: • Blue or brown eyes • A+ or O-
Phenotype vs Genotype • Phenotype • An organism’s physical appearance or visible traits. • Genotype • An organism’s genetic makeup, or allele combinations.
Dominant vs Recessive • Dominant Allele • One whose trait always shows up in the organism when the allele is present • Recessive Allele • Is hidden whenever the dominant allele is present • A trait controlled by a recessive allele will only show up if the organism does not have the dominant allele.
Homozygous vs Heterozygous • Homozygous • Having two identical alleles for a trait • Homozygous dominant • 2 dominant alleles • Homozygous recessive • 2 recessive alleles • Heterozygous • Having two different alleles for a trait • One dominant allele and one recessive allele
Assignment • Exploring Dominant and Recessive Traits • Finish for homework if not completed in class.
