PPT-Linked Genes and Human Inheritance

Humans have approximately 20000 30000 genes that code for traits However only have 46 chromosomes Thus each chromosome must have many genes on them Often seen in SexLinked Traits. 4NeoplasticProcessincludesMeSHtermsreferringtocan-cers. SemanticType IntermediateBMeSHTerms G E A Genes,jun 1 Genes,fos 2 Genes,APC 3 Genes,Reporter 4 Genes,Dominant 5 Genes,ras 6 Genes,rel 7 Genes,bc 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 . 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 :. SBI3U. Mendel Demonstrated. :. Law of Segregation. Law of Independent Assortment. The . alleles. for a gene . segregate independently. . during meiosis. . This applies to alleles located on homologous chromosomes.  . Studying genetics . can be accomplished in part by . investigating the history of discoveries. that have lead to our . understanding of DNA and its role in gene expression and biological inheritance. X-LINKED DOMINANT INHERITANCE. X-LINKED INHERITANCE. dr. . Retno. . Sutomo. , Ph.D., . Sp.A. .. X-LINKED RECESSIVE INHERITANCE. Segregation of X-linked recessive allele. Carrier mother. Segregation of X-linked recessive allele. Discuss with your group the trait you chose, and what you found out about your family!. Be ready to share!!!!. Pedigrees . What is a pedigree. Family tree used to track genetic . disorders/abnormalities. 1. Chromosomal Theory of Inheritance. Theodor . Boveri. Walter Sutton. In 1902, Walter Sutton and Theodor . Boveri. developed the . Chromosome Theory of Inheritance. . . This theory basically states that Mendelian genes have a specific locus on the chromosome and that chromosomes undergo segregation and independent assortment during meiosis. . 12.1 Chromosomal Inheritance . 1. Genes are located on chromosomes; this is called the . chromosome theory of inheritance. .. 12.1 Chromosomal Inheritance. Chromosomes can be categorized as two types:. 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. 1. A. Background. . 1. Genetics. . 1860’s—. Mendel. . proposed that discrete . inherited . factors . segregate . and assort . independently . during gamete . formation. . 2. Cytology. . Inheritance can be defined as the process where one class acquires the properties (methods and fields) of another. . With the use of inheritance the information is made manageable in a hierarchical order.. Important. Notes. For revision only. Objectives: . Asses Mendel’s laws of inheritance. Understand the . bases. of Mendelian inheritance. Define various patterns of single gene inheritance using family pedigree and Punnett’s squares. 23. pair of chromosomes. A human male, has. 22. similar pairs and one pair consisting of two chromosomes that are dissimilar in size and structure. . The 23 rd pair in both the sexes is called .