Gametes Definition Biology
A Gamete is basically the reproductive or sex cells which consist of an only solitary set of unlike chromosomes. It comprised of partial the genetic material necessary to form a complete organism, in other words, it is called Haploid. Gametes are shaped or formed by the process of Meiosis. Meiosis is also known as Reduction Division. In this procedure germ cells experience two divisions, consequentially help in the manufacture of four gametes. During the fertilization process, female and male gametes wrath, and formed a diploid zygote which consists of paired chromosomes. Gametes might be alike in its form and it is known as Isogamy. But in Algae, Fungi, and Protozoans comprised of different gametes which are known as heterogamy or Anisogamy. Gametes of about few Algae, Fungi, Animals and of all advanced plants parade an innovative arrangement of Heterogamy which is known as Oogamy. In this process, one gamete is small and motile which is called the Sperm while the other is nonmotile and large which is known as Egg.
Generally, there are two major examples of gametes are egg or ova and sperm. These gametes are haploid in nature and passed through Internal or external fertilization. These haploid cells which are denoted as gametes vary in size, structure, and function. In various species, ova and sperms produce within the same body of the organism.
Normally they are produced by Meiosis cell division. Due to, two-step disunion it produces four offspring cells which are basically Haploid in nature. Haploid cells consist of one Chromosomal set. When the male and female gametes fused by the specialized phenomena called Fertilization. After fertilization, the zygote is formed. The zygote is diploid and which consists of two sets of chromosomes.
Structure of gametes
Male Gamete in Plants
Pollen grains consists of a plant’s male gametes. Pollen grains are twisted in the anthers of the stamens. which is located on the filaments of the Plant. Each anther comprised of four pollen sacs. They are formed by cell division. Meiosis takes place in the anthers to produce haploid male gametes in the pollen grains. Each pollen grain consists of two Nuclei.