PPT-6.2-Inheritance of Linked Genes

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. Humans have approximately . 20,000 – 30,000. genes that code for traits. . However, only have . 46 chromosomes. . Thus each chromosome must have . many genes. on them. . Often seen in . Sex-Linked Traits. 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 . 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. Genes may be linked or unlinked and are inherited accordingly. . Dihybrid crosses. Unlinked genes segregate independently as a result of meiosis.. . Pairs of alleles are inherited independently of one another if their gene loci are on separate chromosomes (these genes are unlinked). . 11.1 Basic Patterns of Human Inheritance. 11.2 Complex Patterns of Inheritance. EQ: What is the difference between sex linked genes and genes found on autosomal chromosomes? . Chromosomes and Phenotype. 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. Man:. Color. Blindness . Dr. . Asim. . masood. Red. -. Green. Color blindness. What are X-linked recessive . inheritance?. . X-linked recessive inheritance is a mode of inheritance in which a mutation in the gene on the X-chromosom. 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:. Dr. . Aqeel M. . ali. 2019. B. asic . principles of heredity that Mendel discovered from his crosses among pea plants. . A mendelian principle . . sex-linked characteristics determined by . genes located on the sex chromosomes. . 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.. . Sex determination. Sex chromosome is determined at . fertilization time. .. Early stage fetus contains two . ducts system. :. Wolfian. (male).. Mullerian. (female).. Sexual difference starts in the . syntenic. genes. The genes located on the same chromosome are called . syntenic. genes.. When the . syntenic. genes are as close physical association on chromosome to one another preventing independent assortment or c.o. and are being inherited together are known as linked genes.. SEX LINKED INHERITANCE. SEX LINKED INHERITANCE. . X LINKED . INHERITANCE . INHERITANCE. COLOUR BLINDNESS. X LINKED INHERITANCE. Y . LINKED INHERTANCE. HYPERTRICHOSIS. Y LINKED INHERITANCE.