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16. Reproduction

Syllabus
0610–2026–2027
Section
16
Level

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In this section

Topic 16.1

16.1 Asexual reproduction

Objectives in this topic

16.1.1—Asexual reproduction as a process

  • Describe asexual reproduction as a process resulting in the production of genetically identical offspring from one parent

16.1.2—Examples of asexual reproduction

  • Identify examples of asexual reproduction in diagrams, images and information provided

16.1.3—Advantages and disadvantages

  • Discuss the advantages and disadvantages of asexual reproduction: (a) to a population of a species in the wild (b) to crop production

Topic 16.2

16.2 Sexual reproduction

Objectives in this topic

16.2.1—Sexual reproduction as a process

  • Describe sexual reproduction as a process involving the fusion of the nuclei of two gametes to form a zygote and the production of offspring that are genetically different from each other

16.2.2—Fertilisation as the fusion

  • Describe fertilisation as the fusion of the nuclei of gametes

16.2.3—Nuclei of gametes are haploid and that

  • State that nuclei of gametes are haploid and that the nucleus of a zygote is diploid

16.2.4—Advantages and disadvantages of sexual

  • Discuss the advantages and disadvantages of sexual reproduction: (a) to a population of a species in the wild (b) to crop production

Topic 16.3

16.3 Sexual reproduction in plants

Objectives in this topic

16.3.1—Draw the following parts

  • Identify in diagrams and images and draw the following parts of an insect-pollinated flower: sepals, petals, stamens, filaments, anthers, carpels, style, stigma, ovary and ovules

16.3.2—Functions of the structures listed

  • State the functions of the structures listed in 16.3.1

16.3.3—Describe the anthers and stigmas

  • Identify in diagrams and images and describe the anthers and stigmas of a wind-pollinated flower

16.3.4—Pollen grains of insect-pollinated

  • Distinguish between the pollen grains of insect-pollinated and wind-pollinated flowers

16.3.5—Pollination as the transfer of pollen

  • Describe pollination as the transfer of pollen grains from an anther to a stigma

16.3.9—Self-pollination as the transfer

  • Describe self-pollination as the transfer of pollen grains from the anther of a flower to the stigma of the same flower or a different flower on the same plant

16.3.10—Cross-pollination as the transfer

  • Describe cross-pollination as the transfer of pollen grains from the anther of a flower to the stigma of a flower on a different plant of the same species

16.3.11—Potential effects of self-pollination

  • Discuss the potential effects of self-pollination and cross-pollination on a population, in terms of variation, capacity to respond to changes in the environment and reliance on pollinators

16.3.6—Fertilisation occurs when a pollen

  • State that fertilisation occurs when a pollen nucleus fuses with a nucleus in an ovule

16.3.7—Structural adaptations

  • Describe the structural adaptations of insect-pollinated and wind-pollinated flowers

16.3.8—Environmental conditions that affect

  • Investigate and describe the environmental conditions that affect germination of seeds, limited to the requirement for: water, oxygen and a suitable temperature

16.3.12—Growth of the pollen tube and its

  • Describe the growth of the pollen tube and its entry into the ovule followed by fertilisation (details of production of endosperm and development are not required)

Topic 16.4

16.4 Sexual reproduction in humans

Objectives in this topic

16.4.1—Male reproductive system parts

  • Identify on diagrams and state the functions of the following parts of the male reproductive system: testes, scrotum, sperm ducts, prostate gland, urethra and penis

16.4.2—Female reproductive system parts

  • Identify on diagrams and state the functions of the following parts of the female reproductive system: ovaries, oviducts, uterus, cervix and vagina

16.4.3—Fertilisation as the fusion

  • Describe fertilisation as the fusion of the nuclei from a male gamete (sperm) and a female gamete (egg cell)

16.4.4—Adaptive features of sperm

  • Explain the adaptive features of sperm, limited to: flagellum, mitochondria and enzymes in the acrosome

16.4.5—Adaptive features of egg cells

  • Explain the adaptive features of egg cells, limited to: energy stores and the jelly coat that changes at fertilisation

16.4.6—Male and female gametes in terms

  • Compare male and female gametes in terms of: size, structure, motility and numbers

16.4.7—In early development, the zygote forms

  • State that in early development, the zygote forms an embryo which is a ball of cells that implants into the lining of the uterus

16.4.8—Fetus development structures

  • Identify on diagrams and state the functions of the following in the development of the fetus: umbilical cord, placenta, amniotic sac and amniotic fluid

16.4.9—Function of the placenta and umbilical

  • Describe the function of the placenta and umbilical cord in relation to the exchange of dissolved nutrients, gases and excretory products between the blood of the mother and the blood of the fetus

16.4.10—Some pathogens and toxins can pass

  • State that some pathogens and toxins can pass across the placenta and affect the fetus

Topic 16.5

16.5 Sex hormones in humans

Objectives in this topic

16.5.1—Roles of testosterone and oestrogen

  • Describe the roles of testosterone and oestrogen in the development and regulation of secondary sexual characteristics during puberty

16.5.2—Menstrual cycle in terms of changes

  • Describe the menstrual cycle in terms of changes in the ovaries and in the lining of the uterus

16.5.3—Sites of production of oestrogen

  • Describe the sites of production of oestrogen and progesterone in the menstrual cycle and in pregnancy

16.5.4—Role of hormones in controlling

  • Explain the role of hormones in controlling the menstrual cycle and pregnancy, limited to FSH, LH, progesterone and oestrogen

Topic 16.6

16.6 Sexually transmitted infections

Objectives in this topic

16.6.1—Sexually transmitted infection (STI)

  • Describe a sexually transmitted infection (STI) as an infection that is transmitted through sexual contact

16.6.2—Human immunodeficiency virus (HIV) is

  • State that human immunodeficiency virus (HIV) is a pathogen that causes an STI

16.6.3—HIV infection may lead to AIDS

  • State that HIV infection may lead to AIDS

16.6.4—Methods of transmission of HIV

  • Describe the methods of transmission of HIV

16.6.5—Spread of STIs is controlled

  • Explain how the spread of STIs is controlled
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