Grade 08 Science - EC: S8.B.2.2.2
Grade 08 Science - EC: S8.B.2.2.2
Continuum of Activities
The list below represents a continuum of activities: resources categorized by Standard/Eligible Content that teachers may use to move students toward proficiency. Using LEA curriculum and available materials and resources, teachers can customize the activity statements/questions for classroom use.
This continuum of activities offers:
- Instructional activities designed to be integrated into planned lessons
- Questions/activities that grow in complexity
- Opportunities for differentiation for each student’s level of performance
Grade Levels
8th Grade
Course, Subject
Science
Related Academic Standards / Eligible Content
Activities
- Define dominant gene.
- Define recessive gene.
- Define inheritance.
- Identify three examples of dominant traits in humans.
- Identify three examples of recessive traits in humans.
- Identify the difference between genotype and phenotype.
- Explain how dominant and recessive traits are inherited.
- Construct a Punnett square of a parent who is dominant tall (TT) and a mixed hybrid/ carries recessive trait (Tt). What percent of the offspring will be tall?
Answer Key/Rubric
- A dominant gene is a gene that will appear in an offspring if one parent contributes it (produces the same phenotype)
- A recessive gene is a gene which is overridden by a dominant gene, but can appear in an offspring if both parents contribute the gene.
- Inheritance is the genetics transmitted to an offspring from a parent.
- Acceptable responses may include, but are not limited to:
- Brown eyes
- Farsightedness
- Dimples
- Freckles
- Dark hair
- Widow’s peak
- Unattached earlobes
- Acceptable responses may include, but are not limited to:
- Light eyes
- Nearsightedness
- Light hair
- Straight hair
- No dimples
- Attached earlobes
- Normal hairline
- A genotype is present in the genetic makeup of an organism. A phenotype is the observable trait transmitted by the gene, such as eye color, hair color, etc. Phenotype is dependent on the genotype. Genotype contains all the hereditary information of the organism, while phenotype is related to the expressed genes.
- Genes are passed on as an organism reproduces. In the genes passed on, dominant genes are more “powerful” than recessive genes. For each trait, you may show the trait or be a carrier of the trait. You can inherit dominant genes if both parents pass it on, or one passes on the dominant and one passes on the recessive gene. Recessive genes are only inherited if both parents pass on the genetic information for it.
- Punnett square should be constructed in a similar fashion:
100% will be tall.
