Examples of Inherited Traits: See Genotype and Phenotype in Action.

📚 Quick Study Guide

• 🧬Inherited Traits: Characteristics passed down from parents to offspring via genes.
• 🌱Genotype: The genetic makeup of an organism (e.g., BB, Bb, bb). It represents the combination of alleles an individual possesses for a specific trait.
• 👁️Phenotype: The observable characteristics or traits of an organism (e.g., brown eyes, tall height). It's the physical expression of the genotype, influenced by both genetics and environment.
• 🧮 Dominant Allele: An allele that expresses its trait even when paired with a recessive allele (represented by uppercase letters, e.g., B).
• 📉Recessive Allele: An allele that expresses its trait only when paired with another identical recessive allele (represented by lowercase letters, e.g., b).
• ➗ Homozygous: Having two identical alleles for a trait (e.g., BB or bb).
• ➕ Heterozygous: Having two different alleles for a trait (e.g., Bb).
• 🧪Punnett Square: A diagram used to predict the possible genotypes and phenotypes of offspring from a genetic cross.

Practice Quiz

1. What is the definition of an inherited trait?
   1. A characteristic acquired during an organism's lifetime.
   2. A characteristic passed down from parents to offspring via genes.
   3. A characteristic caused by environmental factors.
   4. A characteristic that changes randomly in each generation.
2. Which of the following describes a genotype?
   1. The observable characteristics of an organism.
   2. The genetic makeup of an organism.
   3. The environmental factors affecting an organism.
   4. The evolutionary history of an organism.
3. What is a phenotype?
   1. The specific combination of alleles.
   2. The physical expression of the genetic makeup.
   3. The process of genetic mutation.
   4. The study of heredity.
4. If 'B' represents a dominant allele for brown eyes and 'b' represents a recessive allele for blue eyes, what phenotype does an individual with a 'Bb' genotype have?
   1. Blue eyes
   2. Brown eyes
   3. A mix of brown and blue eyes
   4. No eye color
5. What does it mean for an organism to be homozygous for a particular trait?
   1. Having two different alleles for the trait.
   2. Having one allele for the trait.
   3. Having two identical alleles for the trait.
   4. Having no alleles for the trait.
6. In a Punnett square, what is being predicted?
   1. The exact phenotype of the offspring.
   2. The environmental effects on offspring.
   3. The possible genotypes and phenotypes of the offspring.
   4. The mutation rate of the parents.
7. Which of the following is an example of a phenotype?
   1. BB
   2. Bb
   3. bb
   4. Tall height