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प्रश्न
What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg?
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उत्तर
The egg is produced through meiosis so it contains half the number of chromosomes than a zygote. So, the ratio of chromosome number between an egg and zygote is 1:2. Human males have two types of sex chromosomes - X and Y whereas human females have two X chromosomes. So, the sperms contain either X or Y chromosome whereas eggs contain only X chromosome leading to genetic difference between them.
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संबंधित प्रश्न
Reproductive and Child Healthcare (RCH) programmes are currently in operation. One of the major tasks of these programmes is to create awareness amongst people about the wide range of reproduction related aspects. As this is important and essential for building a reproductively healthy society.
- “Providing sex education in schools in one of the ways to meet this goal.” Give four points in support of your opinion regarding this statement.
- List any two ‘indicators’ that indicate a reproductively healthy society.
If implementation of better techniques and new strategies are required to provide more efficient care and assistance to people, then why is there a statutory ban on amniocentesis? Write the use of this technique and give reason to justify the ban.
What is amniocentesis and why there is a statutory ban on it?
What is meant by contraception?
What substances are contained in oral pills, used as contraceptives? How do they work?
What substances are contained in vaginal pills, used as contraceptives? How do they work?
What is the name of surgical method of birth control (or preventing pregnancy) which is carried out in women?
People who die from AIDS are not killed by the virus itself. Explain.
Define amniocentesis.
Give scientific reasons.
Indians should follow family planning for controlling the population.
What can you suggest to your classmates to keep himself/herself clean and healthy?
A national level approach to build up a reproductively healthy society was taken up in our country in ______.
First or free milk is called ______.
Explain how, offspring and parents of organisms reproducing sexually have the same number of chromosomes?
Given below are events that lead to pregnancy and development of embryo.
- Fertilization of egg
- Maturation of egg
- Release of egg
- Embedding of embryo in thickened uterine wall.
Which of the following options gives the correct order of sequence in which they occur?
Where was "Saheli" developed?
Enumerate and describe any five reasons for introducing sex education to school-going children.
Under which category of contraceptive methods, is the use of condom kept? In what way, its use is better as compared to other methods of contraception?
