CBSE Class 12 Biology Reproductive Health Cross Word

CBSE Class 12 Biology Reproductive Health Cross Word. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.

REPRODUCTIVE HEALTH

UNIT VI CHAPTER 4: REPRODUCTIVE HEALTH (CROSS WORD)

[Figure: Crossword puzzle grid with numbered cells for Across clues 7, 9, 10 and Down clues 1, 2, 3, 4, 5, 6, 8]

Across
7. Absence to menstruation during the period of intense lactation [1 Mark]

Answer:
1. Lactational amenorrhea
2. This is a natural method of contraception based on the fact that ovulation does not occur during the period of intense lactation following parturition.

Teacher's Note:
a) This method relies on the absence of menstruation (amenorrhea) due to high prolactin levels during breastfeeding.
b) It is effective only up to a maximum period of six months following parturition.

9. A small part of the fallopian tube is removed and tied up [1 Mark]

Answer:
1. Tubectomy
2. It is a permanent surgical method of contraception or sterilization performed in females.

Teacher's Note:
a) Tubectomy prevents the meeting of sperm and ovum by blocking the fallopian tubes.
b) Vasectomy is the corresponding surgical sterilization procedure performed in males.

10. Non medicated IUDs [1 Mark]

Answer:
1. Lippes loop
2. Intrauterine devices (IUDs) are inserted by doctors into the uterus through the vagina.

Teacher's Note:
a) Lippes loop is a plastic loop that acts as a non-medicated IUD.
b) It increases phagocytosis of sperms within the uterus.

Down
1. Barriers for females [1 Mark]

Answer:
1. Diaphragms
2. These are rubber barriers inserted into the female reproductive tract to cover the cervix during coitus.

Teacher's Note:
a) Diaphragms, cervical caps, and vaults are reusable barrier methods for females.
b) They block the entry of sperms through the cervix.

2. Fertilisation outside the body [1 Mark]

Answer:
1. In vitro
2. Fertilization is carried out outside the body in almost similar conditions as that in the body, followed by embryo transfer.

Teacher's Note:
a) In vitro fertilization (IVF) is popularly known as a test tube baby program.
b) Zygote or early embryo is transferred into the fallopian tube (ZIFT) or uterus (IUT).

3. Oral contraceptive for the females developed at CDRI [1 Mark]

Answer:
1. Saheli
2. It is a non-steroidal oral contraceptive pill taken once a week.

Teacher's Note:
a) Developed by Central Drug Research Institute (CDRI) in Lucknow, India.
b) It has very few side effects and high contraceptive value.

4. Hormone releasing IUDs [1 Mark]

Answer:
1. Progestasert
2. These are intrauterine devices that release hormones continuously to prevent implantation.

Teacher's Note:
a) Examples include Progestasert and LNG-20.
b) They make the uterus unsuitable for implantation and the cervix hostile to sperms.

5. Unable to produce children [1 Mark]

Answer:
1. Infertile
2. Infertility is the inability to produce children despite unprotected sexual co-habitation.

Teacher's Note:
a) Infertility can be due to physical, congenital, diseases, immunological or psychological factors.
b) Assisted Reproductive Technologies (ART) help such couples have children.

6. Surgical method [1 Mark]

Answer:
1. Sterilisation
2. Surgical interventions block gamete transport and thereby prevent conception.

Teacher's Note:
a) Sterilisation procedures are highly effective but their reversibility is very poor.
b) Common methods include vasectomy in males and tubectomy in females.

8. A foetal sex determination test based on the chromosomal pattern [1 Mark]

Answer:
1. Amniocentesis
2. It is a fetal sex determination and chromosomal abnormality test based on the chromosomal pattern in the amniotic fluid.

Teacher's Note:
a) Amniocentesis involves taking a small sample of amniotic fluid surrounding the developing fetus.
b) It is legally banned for sex determination to prevent female foeticide.