Home
Class 12
BIOLOGY
Give a schematic repesentation of oog...

Give a schematic repesentation of oogesis in humans . Mention the number of chhromosomes at each stage .Correlate the life phases of the individual with the stage of the process .

Text Solution

Verified by Experts


(i) Multiplication phase-The egg mother cell multiplies by mitosis to form oogonia which grow in the follicles.
(ii) Growth phase-In this an oogonium grows into a large primary oocytes by getting nourishment from follicle cells.
(iii) Maturation phase-It involves meiosis. In (meiosis I) large haploid oocytes and a small polar body is formed. Now the follicle ruptures to release secondary oocytes Meiosis II occurs after sperm entry and forms the haploid large ovum and a small polar body. Polar bodies have no function and degenerate.
Promotional Banner

Similar Questions

Explore conceptually related problems

Mention the number of cells in the following stages.

where does oogenesis occur in human ? Describe the stage of the process.

Number of chromosomes in secondary oocyte stage in humans is

Name the major parts of human skeleton. Give the number of bones in each part.

(a)Give a schematic representation of spermatogenesis in humans . (b) At which stage of life does gametogenesis begin in human male and female respectively ? (c )Name the organs where gametogensis gets completed in male and female respectively.

Consider the following four statements (I - IV) related to cell cycle, and select the correct option stating them as true [T] and false [F]. i. G_1 phase is a metabolically active stage of the cell cycle. ii. Interphase is the phase of actual cell division. iii. The number of chromosomes doubles in S-phase. iv. The cells that do not divide further exit the G_1 - phase to enter a quiescent stage.