PPT-Pedigrees and Sex linked Traits

Part 4 What is a PEDIGREE A chart used to trace traits throughout a family Parts of the chart Circle females Squares males Halffilled inDotted carrier Have the gene but do not show signs of it. Homework #2 is due on Monday in lecture.. Change to 1b. . Do not calculate a . c. 2. value. .. Just calculate the . expected. phenotypic ratios if the genes for brown-ness and disease-resistance are actually the same gene (or completely linked). Then, say whether complete linkage is possible given the observed data.. Humans have 46 chromosomes in every cell.. 2 of these chromosomes make us male or female.. Female: XX Male: XY. The Sex Chromosomes:. Has information for male traits.. Few other genes.. The Y chromosome. Kyle . Stutts. . Sam . houston. state . university. Sex-Linked Characteristics. Objectives. Students will be able to:. Comprehend how inheritance plays a role in sex-linked genes. Explain the difference between sex- linked, limited, and influenced inheritance. 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…. Genetics. Complex Characteristics and Sex Influenced Traits. Complex Characteristics. Characteristics that are due to more than one gene. . Eye color, hair color, skin color, height, etc.. Most characteristics where there is a wide range of possibilities. . Contents:. Introduction to sex linked inheritance.. Chromosome carries which type of genes?. Three types of traits. Characteristics of sex linkage.. Types of sex linkage.. Sex linked disorders.. Sex linked inheritance :. Kyle . Stutts. . Sam . houston. state . university. Sex-Linked Characteristics. Objectives. Students will be able to:. Comprehend how inheritance plays a role in sex-linked genes. Explain the difference between sex- linked, limited, and influenced inheritance. Analyzing family trees for patterns of inheritance. Interpreting Pedigrees. What is a pedigree?. How can we look for patterns to determine inheritance of traits?. Pedigrees. Pedigrees are genetic family trees.. A shape with a dot in the center denotes a ‘carrier’. Cartoons of the Day!. Cartoons of the Day!. Cartoons of the Day!. Cartoons of the Day!. Cartoons of the Day!. Are you ready for some Pedigrees?!?!. A visual representation of how a trait is inherited . through generations. . . Earliest. generations are at the . top. .. Each row is . one generation. . . Circle. = female, . Square. = male. Dark shading . pg. 258 #11, 14-17, 19 Sex Linkageare controlled by genes located on either the X or Y chromosome. homologous DNA.Human Y : Stolen and edited from: IMS Dr. Kyle . Stutts. (SHSU) and Brandon . Freel. Objectives. Discuss genetic inheritance.. Investigate principles of inheritance.. Demonstrate how inheritance plays a role in sex-linked genes. Karyotype. Karyotype. – a . picture of . chromosomes. Autosomes. : the first 22 homologous pairs of chromosomes. . Autosomes . are the same for both males and females..  Sex chromosomes. : determines the sex of the individual. . In a plant, long stems are dominant (L) to short stems (l). If a homozygous dominant flower and a homozygous recessive plant are crossed, what would be the phenotypic ratio of their offspring?. Science Fact of the Day.