"Gamete" Essays and Research Papers

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  • Gamete Formation

    Mendel’s ‘factors’ are now called genes Genotype refers to the specific allelic composition of an individual Independent assortment: During gamete formation‚ the segregation of any pair of hereditary determinants is independent of the segregation of other pairs Random sampling error N+N sperm N egg 3n endosperm Degrees of freedom Tetrad (bivalent) Mitosis produces daughter cells that are genetically identical Meiosis produces daughter cells that are not genetically identical

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  • male

    A male (♂) organism is the physiological sex which produces sperm. Each spermatozoon can fuse with a larger female gamete‚ or ovum‚ in the process of fertilization. A male cannot reproduce sexually without access to at least one ovum from a female‚ but some organisms can reproduce both sexually and asexually. Most male mammals‚ including male humans‚ have a Y chromosome‚ which codes for the production of larger amounts of testosterone to develop male reproductive organs. Not all species share a

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  • Green Algae

    Green algae have many similarities to land plants. It has many variety body types and the multicellular forms do not have cells separated into tissues‚ which is what divides green algae from land plants. Green algae are a very diverse group of freshwater algae. Many green algae form long filaments. The cells stay attached after they divide. Spirogyra can become so numerous they form dense mats of growth in surfaces of ponds‚ which is called pond scum. This pond scum is interesting to see through

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  • Production of Gametes - Info

    Human Biology Stage 2B Revision – Test 1 Chapter 10 – Production of Gametes Gonads: Are the primary sex organs Secondary sex organs: Everything else‚ e.g. Seminal Vesicles Males Spermatozoa (sperm): Male gametes Scrotum: Single pouch of skin‚ divided into two sacs internally Lobules: Compartments filled with fine tubes called seminiferous tubules Seminiferous tubules: Fine tubes lined with cells that produce the male gametes. They eventually join together to form a short straight tubule.

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  • Asexual Reproduction Stifles Potential Change

    portion of the parental body by a sexual or asexual process and its subsequent growth and differentiation into a new individual”‚ as stated by the Merriam- Webster English Dictionary. Sexual reproduction is a process whereby the female gamete fuses with the male gamete to form a zygote‚ which potentially develops into genetically different offspring. Essentially this means‚ we combine the genetic information from two individuals of different types or sexes in order to produce a new individual. Asexual

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  • Biology Notes

    Biology – Preliminary – Evolution of Australian Biota 1. Evidence for the rearrangement of crustal plates and continental drift indicates that Australia was once part of an ancient super continent identify and describe evidence that supports the assertion that Australia was once part of a landmass called Gondwana‚ including: ▪ − matching continental margins ▪ − position of mid-ocean ridges ▪ − spreading zones between continental plates ▪ − fossils in common on Gondwanan continents

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  • Ceratopteris Richardii

    Ceratopteris richardii: The effects of increasing spore density in detecting higher percentages of sexually expressed gametes. Abstract: The Ceratopteris genus is a model plant system in allowing the study of life and reproductive cycles of spores‚ allowing for spore to gamete cellular and physical observation. The triangle water fern‚ Ceratopteris richardii‚ provided for visual identification of this transition. Spores of different densities were inoculated‚ cultured‚ and observed in germination

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  • Dna Fact Sheet

    Male: Sperm Female: Ovum (egg) What happens to Gametes at Fertilisation? Fertilisation is the process where sperm (from the male) and the ovum (from the female) fuse together to form the zygote. Each gamete contains 23 chromosomes which combine together‚ in the zygote‚ to combine to a full set of 46 chromosomes – half from the father and half from the mother.. Summed up‚ it is where the male gamete and a female gamete join. The fusion of gametes enables the genetic information to mix. Proteins

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  • Asexual vs Sexual Reproduction Notes

    Mitotic division‚ requiring only one parent.  Offspring are identical replicas of parent.  Cell divides after DNA is replicated. No gametes are formed‚ can also occur by fragmentation (a piece of the organism breaking off) | Meiotic division.  2 parents are required.  Each parent contributes ½ of the genetic material for the offspring.  Each gamete is haploid.  Gametes fertilize to make a diploid offspring. | Both are methods of reproduction‚ in asexual one parent is needed and offspring are identical

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  • Reproduction in Organisms

    * NCERT 1. Reproduction in Organisms INTRODUCTION Biology in essence is the story of life on earth. While individual organisms die without fail‚ species continue to live  through millions of years unless threatened by natural or anthropogenic extinction. Reproduction becomes a vital process without which species cannot survive for long. Each individual leaves its progeny by asexual or sexual means. Sexual mode of reproduction enables creation of new variants‚ so that survival advantage is enhanced

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