Meiosis, Germ Cells, and Fertilization

More documents

Recommendations

Info

$(Microsoft PowerPoint - 6 Odyssey and More.ppt [\254\333\256e\274 ...$

Homolog Segregation Depends on <strong>Meiosis</strong>- Specific, Kinetochore-Associated Proteins • Kinetochores – protein complexes associated with the centromeres • Kinetochores on the two sister chromatids attach to opposite poles of the spindle • Segregate into different daughter cells at anaphase • Arms of the sister chromatids of homologs separate at anaphase I
• Sisters stay glued together in the region of their centromeres until anaphase II • Shugoshins associated with kinetochores help ensure that sister kinetochores do not come apart at anaphase I • Proteolytic enzyme separase cleaves the cohesin complexes
Page 1 and 2: Chapter 21 Sexual Reproduction: Mei
Page 3 and 4: OVERVIEW OF SEXUAL REPRODUCTION •
Page 5 and 6: Fertilization • a haploid sperm f
Page 7 and 8: • germ line (or germ cells) - inc
Page 9 and 10: Crossing-over • the maternal and
Page 11 and 12: MEIOSIS • haploid germ cells aris
Page 14 and 15: Duplicated Homologs (and Sex Chromo
Page 16 and 17: Pairing between sex chromosomes •
Page 18 and 19: During dividing prophase I • Lept
Page 22 and 23: • Meiosis II occurs without DNA r
Page 24 and 25: Normal Gametogenesis
Page 26 and 27: Nondisjunction
Page 28 and 29: Crossing-Over Enhances Genetic Reas
Page 30 and 31: Meiosis Is Regulated Differently in
Page 32 and 33: PRIMORDIAL GERM CELLS AND SEX DETER
Page 34 and 35: • Totipotent - the potential to g
Page 36: Male Female
Page 41 and 42: Four ways Sertoli cells influencing
Page 44 and 45: • molecule retinoic acid produced
Page 46 and 47: EGGS • once activated, it can giv
Page 48 and 49: • Yolk - rich in lipids, proteins
Page 50 and 51: Oogenesis Eggs Develop in Stages
Page 52 and 53: • each chromosome is still compos
Page 54 and 55: Extra gene copies in the cell • d
Page 56: • Follicle stimulating hormone (F
Page 59 and 60: Secondary Follicle
Page 61 and 62: Oocyte in Follicle
Page 63 and 64: SPERM • Sperm (spermatozoon, plur
Page 65 and 66: Sperm Are Produced Continuously in
Page 70 and 71:
•Seminiferous Tubule
Page 73 and 74:
FERTILIZATION • the binding of sp
Page 75 and 76:
Capacitation • sperm arrive in th
Page 77 and 78:
Fertilization
Page 79 and 80:
TEM of the sea urchin egg • Cell
Page 81 and 82:
Sperm Fusion Activates the Egg by I
Page 84:
The Cortical Reaction Helps Ensure
Page 87 and 88:
The Sperm Provides Centrioles as We
Page 89 and 90:
(A) A meiotic spindle in a mature u
Page 91:
• Transferring the nucleus of a s
show all

Meiosis, Germ Cells, and Fertilization

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?