Why this chapter matters
Inheritance principles explain how traits persist or change across generations in families and populations.
What you will learn
- Use meiosis stages to explain reduction of chromosome number and independent assortment.
- Solve monohybrid and dihybrid inheritance problems using probabilistic reasoning.
- Interpret deviations from simple Mendelian ratios, including linkage and non-Mendelian patterns.
Lessons in this chapter
- Meiosis and variationConnect crossing over and independent assortment to new allele combinations.
- Mendelian inheritance modelsUse Punnett squares and probability rules to predict genotype and phenotype outcomes.
- Chromosomal basis of inheritanceLink gene location on chromosomes to segregation patterns.
- Beyond simple dominanceEvaluate codominance, incomplete dominance, and linkage from observed data.
Study task
Analyze a short pedigree and propose the most likely inheritance pattern with justification from at least two observations.
Chapter checkpoint
How does independent assortment increase genetic variation?
During meiosis I, homologous chromosome pairs align independently, producing many possible maternal and paternal chromosome combinations in gametes.