Unit 3 · 6 lessons
Genetic Processes
How meiosis shuffles and halves chromosomes, how traits pass from parents to offspring by predictable rules, and how genetic knowledge has produced technologies that raise real social and ethical questions.
- 62 practice questions
- 53 flashcards
- 2 interactive lessons
Lessons
- 1DNA, Genes, Chromosomes and MitosisHow DNA is organized from nucleotides to genes, chromosomes and the genome, the stages of the cell cycle and mitosis, why mitosis produces identical cells, and how to estimate the time spent in each phase from an onion root tip.11 questions
- 2MeiosisHaploid and diploid cells, the eight stages of meiosis, how crossing over and independent assortment create variation, how meiosis differs from mitosis, and what happens when chromosomes fail to separate.10 questions
- 3Mendelian InheritanceMendel's pea experiments and his laws of segregation and independent assortment, the language of genes and alleles, monohybrid crosses with Punnett squares, test crosses, and the probability rules behind genetic ratios.Interactive10 questions
- 4Beyond Simple DominanceIncomplete dominance, codominance, multiple alleles and ABO blood groups, X-linked inheritance, dihybrid crosses with the product rule, and reading pedigrees.Interactive10 questions
- 5Gene Mutations and Single-Gene DisordersHow substitutions, insertions and deletions change a gene's message, and how single-gene mutations cause cystic fibrosis, sickle cell disease, Huntington disease, PKU and Tay-Sachs disease, along with how each is inherited and treated.11 questions
- 6Chromosomal Disorders and Genetic TechnologiesDisorders caused by abnormal chromosome numbers and structures, how karyotypes are made and read, genetic screening, gene therapy, recombinant DNA, stem cells and reproductive technologies, and the ethical, social and legal questions they raise.10 questions