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Lecture Test 3 Study Guide The lecture test will be composed of multiple choice questions, and a short answer section (which consists mostly of genetic cross problems). You should begin studying for the test well before the night prior to the examination. Below you will find a series of terms which are found in the text that are important to your understanding of the material. You should be very familiar with all the lecture material presented concerning each entry below; the entries under each chapter heading are general and should be review in detail by going over your notes. Chapter 10 Know the definition of the haploid and diploid condition. Know the steps of meiosis and what happens during each step. Know what the homologous pair is and what constitutes one. Understand crossing over. What is the number of chromosomes in human gametes? Distinguish between spermatogenesis and oogenesis. Chapter 11 Define these terms heterozygous, homozygous dominant and recessive. How is a test cross used? Who was G. Mendel? Understand laws discovered by Mendel. Define genotype. Define phenotype. What is a karyotype? What is nondisjunction? Compare incomplete dominance to Mendelian dominance. What is codominance? Tay Sachs disease is example of what type of inheritance pattern? Cystic fibrosis is example of what type of inheritance pattern? Autosomal dominant inheritance – give the definition. Autosomal recessive inheritance - give the definition. Sickle cell disease – what is it? Sex influenced traits – give example and a description. Know difference in sex chromosomes and autosomes. Define and give example of pleiotropy. Sex (X) linked disorders – give example of and describe them. What is Down syndrome? Know symptoms Jacob syndrome. Know symptoms Turner syndrome. Know symptoms Klienfelters syndrome. Be able to work a basic monohybrid & dihybrid genetic crosses.