Science - 2019-20

BIO.5 f - Genetic Variation

The student will investigate and understand common mechanisms of inheritance and protein synthesis. Key concepts include
f) genetic variation.

Bloom's Levels:  Analyze; Understand

Adopted: 2010


  • Genetic information is passed from generation to generation by DNA; DNA controls the traits of an organism.

  • I can explain why some populations have gone extinct or have significant developmental issues.


  • Genotype describes the genetic make-up of an organism and phenotype describes the organism’s appearance based on its genes. Homozygous individuals have two identical alleles for a particular trait, while heterozygous individuals have contrasting alleles. When one allele masks the effect of another, that allele is called dominant and the other recessive. When an intermediate phenotype occurs and no allele dominates, incomplete dominance results. Many other patterns of inheritance exist including multiple alleles, polygenic inheritance, and sex-linked inheritance.


In order to meet this standard, it is expected that students will

f) evaluate karyotype charts and make a determination of the genderand genetic health of the individual.

     provide examples of reasons for genetic  diversity and why it can be an advantage for populations.

     provide examples of mutations that are lethal, harmful, and beneficial.


gene, gene expression, genetic predisposition, dominant, recessive, chromosome, haploid, diploid, allele, phenotype, genotype, trait, homozygous, heterozygous, mutation, albino, inheritance, test cross, inversion, drosophila, pedigree, sex-linked, fertility, pollinator, reproduction, fertilization, embryo, zygote, asexual, gamete, development

Updated: Dec 01, 2017