The phase of the cell cycle that occupies most of a cells life interphase What occurs after cytokinesis is completed? • G1 What is correct sequence of cell cycle • G1, s, g2, mitosis, cytokinesis Cells that are not dividing remain in the • g1 What occurs in s phase • Dna replication The first 3 phases of the cell cycle are known as • interphase Mitosis is the process by which • Nucleus divides Mitosis forms cells that are • Diploid • identical Normal cells become cancer cells when • Cells do not respond to checkpoints How many chromosomes are in the body cells of an organism that has a haploid number of 10 • 20 Somatic cells are • Body cells • diploid Gametes are • Sex cells • haploid Crossing over occurs during • Meiosis • Prophase 1 What provides new genetic combinations? • Random fertilization • Random alignment • Crossing over DNA is in the form of _____ when the cell is not dividing • chromatin Harmful cancer • malignant Checkpoints are checking for: • Is cell big enough • Are spindle fibers attached to chromosomes correctly • Is DNA copied correctly Harmless cancers • benign During what phase does the cell prepare for division • G2 The failure of the chromosomes to separate during division is called: • Nondisjunction Signs of Cancer? • Caution • ABCD What phase of mitosis do chromosomes become visible • prophase What is the correct sequence of events in Mitosis • PMAT How many pairs of chromosomes are present in body cells? • 23 Differentiate between mitosis and meiosis • • • • • Crossing over Two divisions Haploid 4 cells Produces gametes (sperm/egg) Growth of new blood vessels to support tumors is called _________. • angiogenesis What is trisomy 21? • Down Syndrome What is monosomy X? • Turners Syndrome What is XXY • Klinefelter syndrome What two cells are found in the testicles? • Leydig • Sertoli Identify the 3 glands that associate with the male reproductive system? • Bulbourethral (Cowpers) • Seminal vesicle • Prostate What is the pathway that sperm travel through the male reproductive tract? • • • • Semineferous tubules Epididymis Vas deferens urethra Identify the 3 type of spongy tissue in the penis. • Corporus cavernosus • Corporus spongiosum • Spongy urethra 3 layers of uterus • Mucousa • Muscularis • serosa Function of? • • • • Vagina Ovary Fallopian tube uterus Sperm leave the body at ___ feet per second. • 200 Name of the head of the sperm? • acrosome Outer portion of ovary • cortex Leading cause of death from cancer in men • prostate Which hormone acts on spermatogenesi? • FSH – follicle stimulating hormone Identify 2 muscle associated with testis and scrotum • Dartos • cremaster Which cells in the testicles supports sperm development and secretes FSH • sertoli Which analogous structure? • • • • Vagina Labia minora Clitoris Ovaries penis