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प्रश्न
Gender of child is determined by the male partner of couple. Explain with reasons whether this statement is true or false.
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उत्तर
The statement “Gender of the child is determined by the male partner of the couple” is true.
- In males, two types of sperm are produced. One type carries an X chromosome, and the other carries a Y chromosome, along with autosomes. In females, all ova carry only the X chromosome. Therefore, the sperm that fertilizes the ovum determines the sex of the child.
- If an X-bearing sperm fertilizes the ovum, an XX zygote is formed and a female child (daughter) is born. If a Y-bearing sperm fertilizes the ovum, an XY zygote is formed and a male child (son) is born.
- Thus, the father or male partner determines the sex of the child because he contributes either an X or a Y chromosome.
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संबंधित प्रश्न
Write the functions of the following organs of reproduction:
a. Ovaries
b. Seminal vesicle and prostate glands
The structure formed by the villi of the embryo and the uterus of the mother.
Which part of the human body passes sperms from a man to a woman?
What do the testes in a man produce?
What are the male gonads in human beings?
The diagram shows female reproductive system. Name the parts labelled A to D.
(a) In which part do the sperms enter?
(b) Which part releases the egg?
(c) In which part does fertilisation take place?
(d) In which part does the foetus develop?
What changes are seen in boys at the time of puberty?
Which of the following is not a sexually transmitted disease?
(a) gonorrhoea
(b) hepatitis
(c) syphilis
(d) AIDS
Which among the following are not the functions of testes at puberty?
(i) formation of germ cells
(ii) secretion of testosterone
(iii) development of the placenta
(iv) secretion of estrogen
Write two examples of sexually transmitted diseases caused by virus.
Pollen grains are formed by ______ division in locules of anthers.
Give the names:
Methods of family planning.
Choose the correct answer:
The aim of sexual reproduction _________
Give the functions of the following:
Vagina
Explain the term Parturition or birth.
Choose the Odd One Out:
Choose the Odd One Out:
Reproductive organs are also considered endocrine glands.
What occurs during the implantation stage of human reproduction?
