Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
Which of the following statements best explain the importance of mitosis?
I. Mitosis ensures the growth of an offspring
II. Mitosis helps in preserving and maintaining the genetic stability of a particular population .
III. Mitosis ensures that the number of chromosomes of the parent cell is identical to its two daughter cells.
IV. Mitosis maintains the fixed number of chromosomes in sexually reproducing organisms, the most important contribution in reproduction
A. I only
B. I and II
C. I, II, and III
D. I, II, III, and IV
In unicellular organisms, mitosis helps in asexual reproduction as it produces an identical copy of the parent cell. Which of the following organisms reproduce through mitosis?
A. Bacteria
B. Frog
C. Hydra
D. Sea anemones
Which of the following does NOT signifies the application of mitosis?
A. Production of sperms and eggs.
B. An amoeba reproduces through binary fission while hydra and yeast reproduce through budding.
C. You become taller because the bone cells continue to undergo mitosis
D. All the daughter cells resulting from the multiple cell divisions will make up the body of the human.
Dolly is the first mammal to have been successfully cloned from an adult cell Which of the following statement/s is/are most relevant to the birth of Dolly?
I. It suggests that human could be cloned.
II. It proves that specialized cells could be used to create an exact copy of the animal they came from.
III. It improves the production of milk, meat, and other products from livestock.
IV. It proves that animals could be cloned to have gene mutations that help scientists study diseases that develop in the animals.
A. II only
B. I and II
C. III, and IV
D. II, III, and IV
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