Download Free Medical Karyotypes and Chromosomal Disorders PowerPoint Presentation

Karyotypes and Chromosomal Disorders PowerPoint Presentation

DOWNLOAD MEDICAL POWERPOINT PRESENTATION

About This Presentation

Description : Check out this medical presentation on Chromosome, which is titled "Karyotypes & Chromosomal Disorders", to know about karyotypes and chromosomal disorders.

Tags : Chromosome, Karyotypes, Chromosomal Disorders

Published on : Jul 12, 2021 | Views : 2355 | Downloads : 1

Shareable Url :

Embed Code :

Comment

Transcript

Slide 1-

My own grandpa!
Slide 2-

My own grandpa!
Slide 3-

Blue People of KY!
Slide 4-

Karyotypes & Chromosomal Disorders Journal Notes
Slide 5-

Human Karyotype
Slide 6-

Karyotypes photograph of one’s chromosomes, grouped in pairs of homologous chromosomes by size Humans have 1 pair of sex chromosomes (XX or XY) and 22 pairs of autosomes (chromosomes that are not sex chromosomes).
Slide 7-

Chromosome Abnormalities All abnormalities result from an error during meiosis, called “nondisjunction” non – dis – junction The problem arises when during meiosis there is a failure of homologous chromosomes to separate.
Slide 8-

Non-disjunction of chromosomes
Slide 9-

Nondisjunction of chromosomes If non-disjunction occurs, one gamete gets both chromosomes, the other gamete gets nothing.
Slide 10-

Analyzing Karyotypes: 1. Are there 46 chromosomes? 2. Are there 2 identical chromosomes in each pair of autosomes and 2 sex chromosomes? 3. Are there any rearrangements between chromosomes or large, obvious deletions?
Slide 11-

Karyotypes DO NOT show: Individual DNA strands or genes or the DNA sequence The number of genes in a chromosome The presence of gene mutations
Slide 12-

6 Chromosome Disorders caused by Nondisjunction Down syndrome (trisomy 21) Edwards syndrome (trisomy 18) Klinefelters syndrome (trisomy XXY) XYY syndrome (trisomy XYY) XXX syndrome (trisomy X) Turners syndrome (monosomy XO) **Nearly all other nondisjunctions lead to death of embryo or child before adulthood!
Slide 13-

Chromosome Abnormalities Down Syndrome – Extra copy of chromosome 21. Also called “Trisomy 21” Have 47 chromosomes. One of only a few trisomy disorders in which the child has high probability of living to adulthood Short stature Mental retardation Reduced life span Characteristic features
Slide 14-

Down Syndrome Lauren Potter from “Glee”
Slide 15-

Klinefelter Syndrome XXY – Male trisomy of the sex chromosomes 47 Chromosomes Sterile Low testosterone Taller than average Often don’t know they have it unless tested.
Slide 16-

Klinefelter Syndrome XXY
Slide 17-

XYY Syndrome Males with extra Y. 47 chromosomes Taller than average Normal development – never know they have it unless tested. May have sterility problems
Slide 18-

XXX Syndrome Females with extra X 47 chromosomes Taller than average Often develop normally – never know they have it unless tested. May have sterility problems
Slide 19-

Turner Syndrome XO females. Missing 2nd sex chromosome. This is the only monosomy in which the embryo survives. If any other chromosomes are missing then embryo/fetus does not survive. 45 chromosomes Sterile Shorter than average various other characteristic symptoms
Slide 20-

Turner Syndrome - XO