NCERT Solutions For Class 12 Biology Chapter 4: Reproductive Health

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Jasmine Grover

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NCERT Solutions for Class 12 Biology Chapter 4 Reproductive Health are provided in this article. It covers all the important definitions, concepts, and methodologies that will prove to be really beneficial for the students appearing for CBSE Class 12 Exam 2022-23. The important topics that are included in this chapter are:

Expected no. of Questions: 2-3 questions of around 5 marks

Download PDF: NCERT Solutions for Class 12 Biology Chapter 4 Reproductive Health 


NCERT Solutions for Class 12 Biology Chapter 4

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Class 12 Biology Chapter 4 Reproductive Health: Important Topics

Reproductive health means human reproductive systems should be well during all the life stages which include emotional, behavioral, physical, and social well-being. Sexually transmitted diseases transferred during sexual intercourse might lead to unwanted pregnancies, in order to avoid this proper social awareness should be provided to society as a whole. The important topics are discussed below:

  • Amniocentesis

Amniocentesis is the process of prenatal testing that primarily diagnoses fetal infections, chromosomal abnormalities, and even sex determination. The whole process is performed on pregnant women with the primary target of prenatal diagnosis of chromosomal abnormalities and fetal infections and in some cases, sex determination of the fetus.

  • Contraception

Contraceptives are a way to prevent not only pregnancies but also sexually transmitted diseases. Study on contraception helps to spread awareness, which also helps to understand reproductive health in total along with its types and ways in which contraception can be made use.

  • Sexually Transmitted Diseases

Sexually transmitted diseases, also known as Venereal diseases, are infectious diseases transmitted through sexual contact. It is also referred to by the name reproductive tract infections (RTI). However, every STD is not sexually transmitted, they can even spread through non-sexual contact also. 

Some of the sexually transmitted diseases are:

  • Bacterial Vaginosis (BV)
  • Chlamydia.
  • Gonorrhea.
  • Hepatitis.
  • Herpes.
  • HIV/AIDS & STDs.
  • Human Papillomavirus (HPV)
  • Pelvic Inflammatory Disease (PID)
  • Infant Mortality Rate

The infant mortality rate, also called IMR, refers to the number of deaths of infants out of every thousand children born. IMR is an important index in terms of measuring the improvement in the infant’s health and safety during and after birth. 


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CBSE CLASS XII Related Questions

  • 1.
    Assertion (A) : The milk produced by transgenic cow 'Rosie' was nutritionally more balanced product for human babies than natural cow milk.
    Reason (R) : It was human protein enriched milk containing human alpha lactaglobulin.

      • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
      • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
      • Assertion (A) is true, but Reason (R) is false.
      • Assertion (A) is false, but Reason (R) is true.

    • 2.

      Which of the following is a secondary consumer ?

        • Grasshopper
        • Cow
        • Fish
        • Hawk

      • 3.

        (i) Differentiate between a DNA and RNA nucleotide.

        (ii) Name the two types of bonds present within a single nucleotide.


          • 4.

            "Indo-Burma" is considered as a hotspot. What is meant by the term "hotspots" in biodiversity ? List two criteria used for determining a "hotspot". Name any two hotspots of India.


              • 5.

                A student performed some crosses in plants and represented the result in the form of bar graphs as shown below. Each graph displays the phenotypic proportion of the progeny. Study the graphs and answer the questions :

                (c) What conclusion can you draw from the results of bar graphs of crosses I and II ? Name the genetic principle illustrated.


                  • 6.

                    Assertion (A) : The pyramid of biomass in a pond aquatic ecosystem is always inverted.

                    Reason (R) : The biomass of consumers like fishes far exceeds that of the producers like phytoplanktons.

                      • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
                      • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
                      • Assertion (A) is true, but Reason (R) is false.
                      • Assertion (A) is false, but Reason (R) is true.
                    CBSE CLASS XII Previous Year Papers

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