Gregory Mendel introduced the idea of dominant and recessive traits and particulate inheritance by experimenting on pea plants. Alleles are options for the expression of a gene. The gene for eye color has multiple alleles: some for blue eyes and some for brown eyes. Recessive alleles, like those for blue eyes, require two copies to be expressed. Punnett Squares show all the possible combinations of dominant and recessive genes according to the law of independent assortment and probability. Polygenic traits are controlled by more than one gene. Pleiotropic traits are sets of multiple traits that can be controlled by one gene.
law of segregation — For any given trait the pair of alleles separate
and each gamete receives only one of the alleles.
law of independent assortment — Alleles for a particular trait
assort independently of the alleles for other traits.
genotype is the alleles that an individual has for a particular
trait. The phenotype is the physical manifestation of the genotype
one allele is required for the dominant phenotype to be expressed.
Two alleles must be present for phenotypic expression of the
recessive form of a trait.
Punnett square can be used to predict the genotypes and phenotypes
of the offspring from a cross.
dominance occurs when neither allele is fully dominant over the
other. Codominance refers to situations in which both alleles are
polygenic inheritance, more than one gene controls a trait.
Pleiotropy means that a single gene affects multiple traits.
refers to a gene at one locus affecting the expression of genes at
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
The book and CD package include two full length practice exams that are presented with all questions answered and explained. The author also presents detailed reviews of all test topics and includes multiple-choice and free-response questions with answers at the end of each topic's chapter.
This book includes a review of the AP Biology exam format and scoring, proven strategies for answering multiple-choice questions, and hints for tackling the essay questions. The practice tests include answers and explanations and there is also proven test-taking strategies for both the multiple choice and essay parts.