Mississippi Science L.8.2A.4
The Standard
- L.8.2A
- Students will demonstrate an understanding of how sexual reproduction results in offspring with genetic variation while asexual reproduction results in offspring with identical genetic information.
Construct a model of meiosis to explain its role in sexual reproduction, which results in offspring that have a new combination of genetic information different from either parent.
2026 Mississippi College- and Career-Readiness Standards for Science · Reproduction and Heredity
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students model how chromosome pairs separate, then how sister chromatids separate. They show that each resulting gamete has half the starting chromosome number. They combine gametes from two parents to show how an offspring gets a new mix of genes.
What Mastery Looks Like
- A student can move two pairs of duplicated chromosome cards through both divisions and make four gametes. Each gamete has one chromosome from each pair. The student can combine two parents' gametes and identify which chromosomes came from each parent.
Common Misconceptions
- Some students think gametes have a full set of chromosomes, which would double the number at fertilization. Others think all four gametes are identical or that an offspring gets an exact copy of one parent's chromosomes.
How to Assess It
- Exit ticket: Draw two pairs of duplicated chromosomes through both divisions, ending with four gametes. Combine one gamete from each of two parents and label which parent supplied each chromosome.
Lesson moves
Ways to Teach It
Give pairs two pairs of duplicated paper chromosomes in two colors; have them separate homologs, then chromatids, to form four gametes.
Have partners explain why siblings can differ by pointing to two possible gametes made with colored chromosome cards.
Give teams four chromosome cards representing two pairs; teams race to draw possible gametes and reject any with extra chromosomes.
Use pea plant allele cards for two traits to build gametes from two parent plants, then compare possible offspring allele combinations.
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Related Standards
- BIO.3A.1
Model sex cell formation (meiosis) and combination (fertilization) to demonstrate the maintenance of chromosome number through each generation in sexually repro...
- BIO.3A
Students will develop and use models to explain the role of meiosis in the production of haploid gametes required for sexual reproduction.
- L.8.2A.2
Create a diagram of mitosis and explain its role in asexual reproduction, which results in offspring with identical genetic information.
- GEN.5.1
Model the inheritance of chromosomes through meiotic cell division and demonstrate how meiosis and sexual reproduction lead to genetic variation in populations.
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