Contenu connexe Similaire à Variation in chromosome structure and number chapter 8 (20) Plus de Arshad Al-Ghafour (6) 1. PowerPoint Presentation Materials to accompany Genetics: Analysis and Principles Robert J. Brooker Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display CHAPTER 8 VARIATION IN CHROMOSOME STRUCTURE AND NUMBER 5. 8-5 Figure 8.1 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display Short arm; For the French, petite Long arm 7. 8-7 Figure 8.1 Banding pattern during metaphase Banding pattern during prophase 17. 8-28 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display Figure 8.6 Genes derived from a single ancestral gene 19. 8-30 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display Figure 8.7 Duplication Better at binding and storing oxygen in muscle cells Better at binding and transporting oxygen via red blood cells Expressed very early in embryonic life Expressed maximally during the second and third trimesters Expressed after birth 22. 8-21 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display 28. 8-27 Figure 8.11 Telomeres prevent chromosomal DNA from sticking to each other 37. Figure 8.14 8-36 Polyploid organisms have three or more sets of chromosomes Individual is said to be trisomic Individual is said to be monosomic 39. 8-38 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display Figure 8.15 In most cases, these effects are detrimental They produce individuals that are less likely to survive than a euploid individual 41. 8-49 Figure 8.16 Blakeslee noted that this plants is “weak and lopping with the leaves narrow and twisted.” 54. Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display 8-56 Figure 8.22 All four gametes are abnormal During fertilization, these gametes produce an individual that is trisomic for the missing chromosome During fertilization, these gametes produce an individual that is monosomic for the missing chromosome 55. Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display 8-57 Figure 8.22 50 % Abnormal gametes 50 % Normal gametes 58. 8-60 Figure 8.23 This cell will be monosomic This cell will be trisomic Will be degraded if left outside of the nucleus when nuclear envelope reforms This cell will be monosomic This cell will be normal
![INTRODUCTION ,[object Object],[object Object],[object Object],[object Object],[object Object],8-2 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)