Advertisements
Advertisements
प्रश्न
What would be the effect if meiosis did not occur in nature?
उत्तर
- During meiosis, reduction division produces four haploid cells (gametes i.e. human sperm cell and egg cell) from a single diploid cell. Hence, if meiosis does not occur, it will result in a doubling of chromosomes in each successive generation, which will result in the formation of abnormalities.
- If meiosis does not occur, the chromosome number of parents and their offsprings will differ in every generation, hence no species will hold its characters.
- Also, there will be no crossing over of homologous chromosomes. Thus, there will be no variations with respect to the changing environment in progeny to maintain their existence, which may lead to the extinction of species.
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true (T) or false (F):
The plumule of an embryo gives rise to the root system.
When pregnancy does not occur, the life of corpus luteum is about ______.
Name the following:
The fully developed part of the ovary containing a mature egg
Give appropriate term of the following:
The attachment of developing zygote (blastocyst) on the uterine wall.
Name the following:
Fusion of sperm and ovum.
What are the functions of testes?
How is the fetus protected?
Give Reasons
Millions of sperms are produced at ejaculation yet one sperm actually fertilizes the ovum. Explain.
Explain the term Cowper’s glands.
Give Technical Term:
What term is used for the production and maturation of sperms in the testes?
Give Technical Term:
Rupture of the follicle and release of the ovum from the ovary.
Multiple choice question.
In human female, the fertilized egg gets implanted in uterus _______.
Answer the following question.
What is capacitation? Give its importance.
Which parts are converted into Seed and fruit respectively after fertilization?
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
Explain the process of fertilization.
What is fertilization?
State whether True or False:
The chromosome number in germ cells producing the gametes are diploid.
What are autosomes chromosomes?
What is sex chromosomes?
