PPT-Karyotypes and Sex-Linked Traits

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 . 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. Essential Question: . How are dominant and recessive sex-linked traits passed onto offspring?. Sex-linked traits are determined by genes on sex-chromosomes.. Most. sex-linked alleles (genes) are carried on the X 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…. 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. 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 :. R. evised based on textbook author’s notes.. Doubly linked lists. A linked list in which each node contains a data component(s) and two links: . one pointing the next node and . one pointing to the preceding node.. Human Genetics. . Thomas Hunt Morgan. – (early 1900’s). - Worked with Drosophila (fruit flies).. - Discovered sex chromosomes (X and Y)…Y is shorter than X in length.. - Females = XX Males = XY. Part 4. What is a PEDIGREE. A chart used to trace traits throughout a family. Parts of the chart. Circle = females. Squares = males. Half-filled in/Dotted = carrier. Have the gene but do not show signs of it. 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. . Sex determined by . genes. found on the . X. and . Y. chromosome. Females: . egg. produced with an . X. chromosome. Males: . ½. sperm cells contain . X. ; and the other . ½. contain . Y. There is a . Sex-Linked Traits. Traits controlled by a gene found on the sex chromosome. The Y chromosome is shorter than X; therefore, some genes on the X chromosome may be missing from Y. Sex-linked disease is less likely to affect females because they have 2 X chromosomes. Which gender (male or female) is most likely to have sex-linked traits? . How many X chromosomes do males have? . How many X chromosomes do females have? . Why does a single X chromosome that carries the allele for red-green colorblindness cause males to be color blind but . Sex Determination. Xy =. . XX= . female. male. Female . karyotype. Male . karyotype. X and Y chromosomes. Who decides. ?. Mom can give X . Dad can give X or Y.