Download Study Guide - Southington Public Schools

Study Guide for Honors Biology test: Chapter 9
This test will consist of several sections. Some will be multiple choice and some parts you will have to fill in
short answers. There will also be diagrams to interpret.
Chapter 9- Patterns of Inheritance
You should be able to:
 Define the following terms—trait, purebred, hybrid, gene, allele, dominant, recessive,
gamete, homozygous, heterozygous, carrier, phenotype, genotype, homologous,
haploid, diploid, tetrad.
 Identify the first researcher in genetics, the organism he studied and some
characteristics of that organism that made the study of genetics much easier.
 Explain the crosses involved in Mendel’s P, F1 and F2 generations.
 Solve genetics problems for monohybrid (one trait) and dihybrid (two traits at once)
crosses using a Punnett square.
 Recognize unusual patterns of inheritance such as codominance, incomplete
dominance, multiple alleles and polygenic by the appearance in offspring.
 Describe the inheritance of blood type in humans, including what is physically
different on the blood cells with various allele combinations.
 Explain why most harmful genetic disorders (such as Tay-Sachs, hemophilia, Cystic
Fibrosis) are inherited through recessive alleles.
 Interpret a basic pedigree chart and recognize patterns of inheritance shown.
 Explain why genetic outcome is predicted by probability and not certainty.
 Explain why linked genes may or may not appear to sort independently as predicted
by Mendel.
 Describe the use of a “testcross” in determining the genotype of an unknown
dominant looking individual.