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98 Black BC Small BS Q1 Based on the data above what can you conclude about the position of the 3 alleles on the Drosophila Flies chromosomes Explain The cross involving Body Color and Bristle Size. Questions with true or false answers. Here are a selection of questions on genetics and inheritance, all with true or false answers. Just delete any questions that you do not want to use. .. Chromosomes and genes. This presentation . builds on session 1 exploring patterns of inheritance. Patterns of inheritance. The objectives of this presentation are to:. Understand how genes are inherited. Understand the differences between the inheritance patterns associated with Autosomal dominant, Autosomal recessive, X-linked recessive and chromosomal abnormalities. Complex Inheritance Patterns:. Autosomal v. X-Linked. Pedigree. Family Tree. Genealogy. Inheritance . Diagram. Relates . parents and offspring for numerous generations. Shows relationships between parents, children, grandchildren…. Have you ever seen a family tree… do you have one??. Graphic representation of family inheritance.. Pedigree of Queen Victoria. Inheritance patterns:. Autosomal. dominant:. Examples: Polydactyly. What is the phenotypic ratio for dragons that are Winged/Horned/Red?. W = wings w= no wings. H = horned h= no horns. G = green g = red. Parents = . WwhhGg. x . Chapter . 7 Extending . Mendelian. Genetics . Section 7-1 Chromosomes and Phenotype. KEY CONCEPT . The chromosomes on which genes are located can affect the expression of traits.. MAIN IDEAS . • Two copies of each . Humans have 23 pairs of chromosomes, containing 3 billion letters of DNA code and 24,000 genes.. One set comes from MOM and one set comes from DAD. There are 22 pairs of autosomes and 1 pair of sex chromosomes, X and Y.. 1 GRADING RUBRIC. Autosomal Dominant. A . = the trait (a genetic disease or abnormality, dominant) a = normal (recessive) . . a) . Write the genotype of the affected (abnormal) individual next to her symbol in the pedigree . ..  . I. f . individuals I-1 and I-2 had a fourth child, what is the chance that the child would have attached earlobes. ?. 1- 0%. 2- 50%. 3- 75%. 4- 100%. Answer is 2- 50%. The pedigree below tracks the presence of dimples through a family's generation. Having dimples is an autosomal dominant trait.. Two copies of each autosomal gene affect phenotype.. Mendel studied autosomal gene traits, like hair texture. . Mendel. ’. s rules of inheritance apply to autosomal genetic disorders.. A heterozygote for a recessive disorder is a carrier. . A genetic disorder that is caused by abnormality in an individual's DNA. Abnormalities can range from small mutation in a single gene to the addition or subtraction of a whole chromosome or set of chromosomes.. KEY CONCEPT . The chromosomes on which genes are located can affect the expression of traits.. Two copies of each autosomal . gene . affect phenotype.. Mendel studied autosomal gene traits, like hair texture. . A. Karyotypes. C. Down Syndrome. 1. Down syndrome is most common autosomal trisomy, involves chromosome 21. .. 2. Most often, Down syndrome is due to nondisjunction during gametogenesis.. a. In 23% of cases, the sperm had the extra chromosome 21..