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Sexual reproduction

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Sexual reproduction involves the fusion of gametes from two different individuals of the same species to produce offspring. It occurs through the process of fertilization, where a male gamete fuses with a female gamete to form a zygote. Fertilization can be external, occurring outside the body, or internal, occurring inside the female reproductive tract. Sexual reproduction leads to genetic diversity in offspring and the incorporation of new gene combinations. Gametes are formed through meiosis which reduces the number of chromosomes to half that of somatic cells. In flowering plants, sexual reproduction occurs through specialized flower structures that contain male stamen and female pistils.

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SEXUAL REPRODUCTION
WHAT IS SEXUAL REPRODUCTION? ? It is the production of offsprings by the fusion of two gametes which are obtained from two different individuals [ one male and other female] of the same species. ? Gametes are the special cells produced for reproduction by special reproductive organ . ? Sexual reproduction always includes the process of FERTILISATION.
FERTILISATION ? The process of fusion of two gametes to produce the first single cell is called fertilisation. ? The first cell formed after fertilisation is called ZYGOTE. ? Fertilisation is of two types : 1. External Fertilisation: Fertilisation takes place outside the body. Eg Frogs, Fish etc. 2. Internal Fertilisation: The fusion of the gametes occurs inside the female reproductive tract.
Characteristics of sexual reproduction ? It usually occurs in complex multicellular organisms. ? It involves fusion of gametes from different individuals and hence brings about diverse character. ? It also leads to incorporate new combinations of genes. ? It¡¯s important Feature is the formation of GAMETES.
FORMATION OF GAMETES ? Gametes are formed in the specialized organs. ? They are formed by a special kind of cell division called meiotic division. ? This is the kind of division where the genetic content of the cells is reduced to half. That is if the somatic cells of the body have 2n chromosomes then the gametes would have n number of chromosomes.
Sexual reproduction
Sexual Reproduction in Flowering plants ? The flowering plants reproduce by sexual methods, for which they develop special organs. ? The flower is the reproductory organ system which is further divided into sub parts which play specific functions in the process of reproduction. ? It is divided into 2 major parts called the Acessory Whorl and Essential whorl.
? The following is the bifurcation of the structure of the flower: ? Accessory Whorl: 1. Sepal [ CALYX] 2. Petals [COROLLA] ? Essential Whorl: 1. Stamen [ ANDROCEIUM] 2. Pistil [GYNOCEIUM]
Structures of a typical flower: Angiosperms reproduce sexually by producing flowers

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Sexual reproduction

  • 2. WHAT IS SEXUAL REPRODUCTION? ? It is the production of offsprings by the fusion of two gametes which are obtained from two different individuals [ one male and other female] of the same species. ? Gametes are the special cells produced for reproduction by special reproductive organ . ? Sexual reproduction always includes the process of FERTILISATION.
  • 3. FERTILISATION ? The process of fusion of two gametes to produce the first single cell is called fertilisation. ? The first cell formed after fertilisation is called ZYGOTE. ? Fertilisation is of two types : 1. External Fertilisation: Fertilisation takes place outside the body. Eg Frogs, Fish etc. 2. Internal Fertilisation: The fusion of the gametes occurs inside the female reproductive tract.
  • 4. Characteristics of sexual reproduction ? It usually occurs in complex multicellular organisms. ? It involves fusion of gametes from different individuals and hence brings about diverse character. ? It also leads to incorporate new combinations of genes. ? It¡¯s important Feature is the formation of GAMETES.
  • 5. FORMATION OF GAMETES ? Gametes are formed in the specialized organs. ? They are formed by a special kind of cell division called meiotic division. ? This is the kind of division where the genetic content of the cells is reduced to half. That is if the somatic cells of the body have 2n chromosomes then the gametes would have n number of chromosomes.
  • 7. Sexual Reproduction in Flowering plants ? The flowering plants reproduce by sexual methods, for which they develop special organs. ? The flower is the reproductory organ system which is further divided into sub parts which play specific functions in the process of reproduction. ? It is divided into 2 major parts called the Acessory Whorl and Essential whorl.
  • 8. ? The following is the bifurcation of the structure of the flower: ? Accessory Whorl: 1. Sepal [ CALYX] 2. Petals [COROLLA] ? Essential Whorl: 1. Stamen [ ANDROCEIUM] 2. Pistil [GYNOCEIUM]
  • 9. Structures of a typical flower: Angiosperms reproduce sexually by producing flowers