Unit 058-11% of exam7 lessons

Heredity

Meiosis, Mendelian genetics, and inheritance patterns.

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Lessons

5.1MeiosisMeiosis is a two-division process that halves chromosome number to produce haploid gametes.
5.2Meiosis and Genetic DiversityCrossing over, independent assortment, and random fertilization together generate the enormous genetic diversity that fuels evolution.
5.3Mendelian GeneticsMendel's laws of segregation and independent assortment, and the tools (Punnett squares, test crosses, probability, chi-square) used to predict and test inheritance patterns.
5.4Non-Mendelian GeneticsMany traits deviate from simple dominant/recessive inheritance through incomplete dominance, codominance, multiple alleles, sex linkage, linked genes, and polygenic inheritance.
5.5Environmental Effects on PhenotypePhenotype results from the interaction of genotype and environment, and heritable changes in gene expression can occur without altering the DNA sequence.
5.6Chromosomal InheritanceInheritance patterns can be traced through pedigrees and are explained mechanistically by the behavior of chromosomes during meiosis, including cases of nondisjunction.
5.5 (math)Chi-Square Analysis in GeneticsTesting whether observed offspring ratios really differ from your prediction.

Figure · reference

Meiosis I and II producing four haploid gametes

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