Compare and contrast the processes of oogenesis and spermatogenesis
What will be an ideal response?
In spermatogenesis, four viable haploid gametes are produced, each with only one set of chromosomes. In oogenesis, one viable egg with 23 chromosomes and three polar bodies that play no part in fertilization or sexual reproduction is produced. Also, spermatogenesis continues to completion in the testes. However, oogenesis does not continue to completion in the ovaries; it is completed only if the egg is fertilized. Spermatogenesis is an almost continuous process; oogenesis occurs approximately once a month. Spermatogenesis continues throughout the life of the male; oogenesis ceases at menopause.
You might also like to view...
The cyanobacterium Trichodesmium ________.
A. fixes a significant amount of N2 in oceanic environments B. uses nitrite as a source of nitrogen C. is a spherical organism D. fixes N2 during the day
Four of the five answers listed below possess chloroplasts. Select the exception
a. mesophyll cells b. guard cells c. sclereid cells d. palisade cells e. spongy cells
Which of the following statements best describes common variable immunodeficiency?
A. Symptoms appear in infancy. B. It is inherited as an X-lmked recessive. C. It is invariably fatal for the patient. D. There is a deficiency of IgA, IgG, or both.
Which of the following is a true statement about meristems? Select all that apply.A) They can be apical or lateral.B) Meristematic cells divide into two cells, one of which remains a meristem cell and another that becomes a plant body cell.C) Apical meristems give rise to three types of embryonic tissues.D) Meristematic cells are found only in eudicots and not in monocots.E) They are responsible for primary and secondary growth.
What will be an ideal response?