Advertisements
Advertisements
Question
Explain two main process in sexual reproduction.
Advertisements
Solution
Two main processes involved in sexual reproduction:
- Gamete formation: In this, meiotic division occurs due to which chromosome number is reduced to half. As a result, haploid gametes are formed (2n → n).
- Fertilization: Haploid male gamete (n) fuses with the haploid female gamete (n) to form a diploid zygote (2n).
APPEARS IN
RELATED QUESTIONS
Women are often blamed for producing female children. Consequently, they are ill-treated and ostracized. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?
The following is the illustration of the sequence of ovarian events (a − i) in a human female
(i) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
(ii) Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event.
(iii) Explain the changes that occur in the uterus simultaneously in anticipation.
(iv) Write the difference between ‘c’ and ‘h’.
(v) Draw a labeled sketch of the structure of a human ovum prior to fertilization.
Draw a labelled diagram of sperm.
Give scientific reason.
There is a menopause when women are 45-50 years old.
In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?
The Androgen Binding Protein (ABP) is produced by ____________.
Draw a labeled sketch of a spermatozoan.
Identify the enzyme released by the sperm which has lytic activity.
How many autosomes does a human primary spermatocyte have?
Acrosome reaction in sperm is triggered by ______.
How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.
Gray crescent is the area ______.
Which of the following groups of cells in the male gonad, represent haploid cells?
During oogenesis, each diploid cell produces ______.
Which of the following is a primary sex organ of female?
Mark the odd one.
What does the figure represent?
What is the difference between a primary oocyte and a secondary oocyte?
During oogenesis the meiotic division is arrested at ______ before fertilization.
What is the primary purpose of gametogenesis in organisms?
