Reproduction 2
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1. Sexual reproduction involves two parents and produces offspring that are genetically different from both parents and each other. Asexual reproduction involves one parent and produces offspring that are genetically identical to the parent and each other. 2. In plants, sexual reproduction occurs through flowers and pollination, where pollen contains sperm that fertilizes eggs in ovules. This results in seeds and fruit. In animals, fertilization can be external or internal. 3. Examples of asexual reproduction in organisms include binary fission in bacteria, budding in yeast, and parthenogenesis in some species like whiptail lizards and sharks. Asexual reproduction allows for more rapid reproduction without the need to find a mate.
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This document is a PowerPoint presentation about sexual and asexual reproduction in humans. It defines sexual reproduction as involving the fusion of male and female gametes through fertilization to form a zygote. Asexual reproduction occurs through mitosis, where cells divide to form genetically identical offspring. The presentation describes the processes of meiosis in gamete formation and mitosis in embryo development. It compares the key differences between sexual and asexual reproduction.
Amphibians and reptiles
Amphibians live both on land and in water, having thin skin that allows absorption of water and oxygen. They go through a metamorphosis where larvae with gills transform into adults with lungs on land. While amphibians were the first to move onto land, reptiles later evolved with thicker scaly skin and shells for their eggs, allowing full adaptation to life on land.
Meiosis
La meiosis es el proceso de división celular por el cual las células diploides producen células haploides llamadas gametos. Consta de dos divisiones celulares sucesivas, Meiosis I y Meiosis II. En la Meiosis I, los cromosomas homólogos se aparean y se separan reduciendo el número de juegos cromosómicos a la mitad, mientras que en la Meiosis II se dividen los cromosomas individuales sin apareamiento. Esto da como resultado cuatro células haploides con una variación genética mayor debido
Meiosis
Meiosis is a type of cell division that produces gametes, such as sperm or egg cells, with half the number of chromosomes as the original parent cell. It involves two cell divisions - Meiosis I and Meiosis II. This results in four daughter cells with half the chromosome number, allowing for genetic variation through independent assortment and crossing over during prophase I. Fertilization occurs when a sperm fuses with an egg, restoring the full chromosome number.
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Sexual reproduction involves two parents and produces offspring that are genetically unique from each other and their parents. Asexual reproduction involves one parent and produces offspring that are genetically identical to the parent and each other. The document provides examples of both types of reproduction in animals and plants, including binary fission in bacteria, budding in yeast, and parthenogenesis in some lizards and sharks. It also compares the pros and cons of each method.
Reproduction
There are two main types of reproduction: asexual and sexual. Asexual reproduction requires only one parent and produces offspring that are genetically identical clones. It occurs through binary fission, budding, or fragmentation. Sexual reproduction requires two parents and produces offspring with genetic variations from the parents. It can occur through external fertilization in water or internal fertilization within the female's body. Sexual reproduction creates more genetic diversity to help species adapt and survive.
Meiosis on the GO!
Angiosperms are flowering plants that represent over half of all known plant species. They contain reproductive organs like the pistil, which is the female structure. Flowers serve the function of containing the reproductive organs to produce seeds through fertilization. Some angiosperms like sunflowers have showy flowers, while others like grasses have smaller, less noticeable flowers. Overall, angiosperms are the largest group of plants and make use of flowers for sexual reproduction and seed production.
Methods of reproduction
Methods of reproduction can be sexual, requiring two parents, or asexual with one parent. Asexual reproduction results in offspring that are exact clones of the parent with little variation. Common asexual reproduction methods include binary fission in single-celled organisms, budding where new growth emerges from the parent, and fragmentation where a parent breaks into pieces that form new individuals. Sexual reproduction requires an egg and sperm and results in offspring with unique genetic combinations from both parents, increasing variation within a species.
GO 2_2 Asexual and Sexual Reproduction.ppt
This document describes different types of reproduction, including asexual and sexual reproduction. It discusses four types of asexual reproduction: binary fission, budding, spore production, and vegetative reproduction. Sexual reproduction requires two parents and produces offspring with a mix of both parents' characteristics. The document outlines sexual reproduction in both animals, which involves the union of sperm and egg cells, and plants, which involves pollen fertilizing ovules.
Reproduction Reproduction Reproduction Reproduction
Asexual reproduction requires only one parent and produces offspring that are genetically identical clones of the parent. It occurs through binary fission in bacteria, fragmentation in flatworms, and plant cuttings. Organisms that reproduce asexually include hydra, sea stars, strawberries, archaebacteria, eubacteria, euglena, and paramecium. Sexual reproduction requires two parents and produces offspring that share genetic characteristics from both parents. It can occur internally through fertilization inside the female or externally through fertilization of eggs laid by the female. Organisms that reproduce sexually include chickens, iguanas, lobsters, sharks, humans, butterflies, sunflowers, and roses.
methods_of_reproduction_ppt-2 (1).ppt
Asexual reproduction requires only one parent and produces offspring that are exact genetic copies. This process is faster than sexual reproduction but does not allow for variation and evolution. Common asexual reproduction methods include binary fission, budding, fragmentation, and spore production.
Sexual reproduction requires two parents and the fusion of egg and sperm to produce offspring with unique combinations of genetic material. This process creates genetic variation and drives evolution by allowing populations to adapt to changing environments. Common sexual reproduction methods include pollination, external fertilization in water, and internal fertilization in mammals and other land animals.
Birth & reproductive developmental process
This document discusses reproduction and development in vertebrates and invertebrates. It explains that some fish can change sex and produce both eggs and sperm. It also describes the fertilization process and germ layer formation in development. Key differences between vertebrates and invertebrates are highlighted, and examples of reproductive modes in bony fish, flatworms, insects and their life cycles are provided.
Reproduction-PUC_II
Sexual reproduction involves the fusion of male and female gametes (sperm and egg) to form a zygote, which undergoes cell division and differentiation during embryogenesis to develop into a new organism. Asexual reproduction does not involve gametes and can involve processes like budding, fragmentation, fission, or spore formation to produce offspring that are genetically identical to the parent. While asexual reproduction is faster, sexual reproduction introduces genetic variation between offspring and parents, which can contribute to evolution of the species over generations.
Reproduction unit
Reproduction allows organisms to produce offspring that inherit traits from their parents, ensuring the survival of their species. Sexual reproduction involves the combination of genetic material from two parents through the fertilization of an egg, while asexual reproduction involves a single parent and can occur through budding, spore formation, or other means. Different reproduction methods allow organisms to adapt to their environments and fill ecological niches in various habitats.
Plant and Animal Reproduction.ppt
This document provides information about animal and plant reproduction. It defines sexual and asexual reproduction, and describes the key differences. It explains the processes of pollination and fertilization in flowering plants. It also covers types of asexual reproduction like budding, fragmentation, and fission. Examples are given of asexual reproduction in plants like strawberries and potatoes, as well as in animals like hydra and yeast. The document aims to describe the types and compare methods of animal and plant reproduction.
reproduction in organism class xii
This document discusses reproduction in organisms. It describes the two main types of reproduction as asexual and sexual reproduction. Asexual reproduction involves a single parent and produces offspring identical to the parent, while sexual reproduction involves male and female gametes from separate individuals producing offspring with genetic variation. The document outlines the key stages and processes of sexual reproduction including gamete formation, gamete transfer, fertilization, and post-fertilization development. It also discusses different reproductive strategies in plants and animals.
Presentación1
Plants and fungi reproduce through both asexual and sexual reproduction. Flowering plants reproduce sexually, with pollen carrying genetic information from male to female parts during pollination to fertilize ovules into seeds. Non-flowering plants like ferns and mosses lack flowers and seeds and instead reproduce using spores. Fungi also reproduce via spores rather than seeds.
Reproduction in plants mili and anto
This document summarizes key parts of flowering plants and their sexual reproduction. It describes the structures of flowers, including sepals, petals, stamens and carpels. It explains pollination and how pollen tubes carry pollen to the ovary for fertilization. The document contrasts insect-pollinated and wind-pollinated flowers. It also summarizes the process of fertilization, seed and fruit formation, dispersal of seeds, and germination of seeds.
Reproductive strategies (bd)
Reproductive strategies involve adaptations that improve chances of fertilization or offspring survival. There are two main types: asexual reproduction requiring one parent produces clones, while sexual reproduction between two parents creates genetic variation. Asexual reproduction is simple but limits variation, while sexual reproduction requires more energy but allows adaptation to changing environments.
Methods of reproduction
Sexual and asexual reproduction were discussed. Asexual reproduction requires only one parent and produces offspring identical to the parent. Methods of asexual reproduction include binary fission, budding, fragmentation, and parthenogenesis. Sexual reproduction requires two parents and combines their genetic material, producing offspring with genetic variation. Methods of sexual reproduction are pollination, external fertilization, and internal fertilization.
Reproduction 121114071711-phpapp02
This document summarizes asexual and sexual reproduction in animals. It describes the key differences between asexual and sexual reproduction, and lists some advantages and disadvantages of each. Some methods of asexual reproduction like budding, fragmentation, and spore formation are explained. Sexual reproduction requires male and female gametes to form a zygote, introducing genetic variation. The stages of sexual reproduction in mammals including gamete formation, fertilization, embryo and fetus development, and birth are outlined in detail.
Notes sexual reproduction
Sexual reproduction involves the union of male and female gametes to produce genetically diverse offspring. It has advantages like producing variations that help organisms survive environmental changes. The simplest form is protist conjugation where cytoplasm bridges form between two cells allowing nuclear material exchange. Sexual reproduction forms a new individual through the fusion of gametes, and can involve hermaphroditism. Fertilization is the joining of sperm and egg to form a zygote, and can be internal or external.
Chapter - 1 Class-12 Reproduction in organisms.
Reproduction can occur through asexual or sexual means. Asexual reproduction involves a single parent and produces offspring that are genetically identical. Sexual reproduction involves two parents and produces offspring with genetic variation. The document then describes the key stages and processes of both asexual reproduction (such as binary fission and budding) and sexual reproduction (including gamete formation, fertilization, and embryo development) in organisms ranging from plants and fungi to animals. Examples are provided to illustrate different modes of asexual and sexual reproduction.
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Asexual reproduction requires only one parent and produces offspring that are genetically identical clones. It occurs through mitosis, binary fission, budding, fragmentation, regeneration, and vegetative reproduction. Common organisms that reproduce asexually include hydra, sea stars, strawberries, and yeast. Sexual reproduction requires two parents and produces offspring with a mix of both parents' genes. It is found in animals, plants, and some other eukaryotic organisms and can occur internally or externally.
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Reproduction 2
- 2. Asexual Reproduction Sexual Reproduction 1.One Parent 2.Offspring are genetically identical to the parent 3.Offspring are genetically identical to each other. 1.Two Parents 2.Offspring are genetically different from parents. 3.Offspring are genetically different from each other.
- 3. Sexual Reproduction It “ain’t” only what you think! 1. Involves 2 parents. OR
- 4. OR……..
- 5. Sexual Reproduction 2. Offspring are genetically different from either parent. – The genes of the offspring are different from the parents. – Half of your chromosomes came from the egg and half from the sperm. – You are not exactly like either parent though you received half of your genes from each parent. – The offspring are different from each other with the exception of identical twins.
- 6. Sexual Reproduction 3. Always involves sperm and egg. WAIT! What about those plants? – Pollen contains sperm. – Ovules contain eggs. – Let’s take a closer look…. Video Link
- 7. Reproductive Organs in Plants: Flowers Female Part – Pistil •Has a sticky top part called the stigma. It catches the pollen. •The skinny style holds up the stigma. •The fat bottom is called the ovary. The ovary holds the ovules or eggs. It becomes the fruit. (Draw this)
- 8. Male Part – Stamen •The top yellow part is called the anther . It makes and releases pollen. Pollen contains the sperm. •The stalk is called the filament and it holds the anther up high. Reproductive Organs in Plants: Flowers and Cones
- 9. Pollination Flowers that are pollinated by insects have bright petals.
- 10. ALL Trees reproduce sexually. Some using flowers and some cones. • Most deciduous trees (those with regular leaves that fall off in the winter) reproduce sexually using flowers. • Some attract insects with their pretty petals and nectar. • Most trees do not have pretty petals because the wind pollinates their flowers.
- 11. From Flower to Fruit
- 12. Evergreen Trees Sexually Reproduce Using Cones Male Cones - fall off after releasing their pollen in the spring. Female Cones - are green when they receive the pollen. It takes 2 years for the seeds to mature. The cone then opens and releases them.
- 13. From Meiosis to Zygote Meiosis Meiosis Fertilization 24 chromosomes 24 chromosomes 48 chromosomes Zygote sperm egg
- 14. Sexual Reproduction in Animals 1. External fertilization – most common in aquatic animals- because there is water, the sperm can swim. • Oysters and coral and sponges • Fish (spawning) • Amphibians (frogs) 2. Internal fertilization – copulation – male deposits sperm inside the female. • Insects • Snails (Hermaphrodites) • Worms (Hermaphrodites) • Reptiles • Mammals • Birds
- 17. Asexual Reproduction •One parent. •Parent and offspring genetically identical. •Offspring identical to each other.
- 18. Example: Binary Fission Fission – the division of bacteria into two daughter cells. Bacteria does not have a nucleus so we do not call this mitosis. Bacteria is unicellular – one celled.
- 19. Example: Mitosis Protozoa or little animals have a nucleus that divides first.
- 20. Examples of asexual reproduction: Budding Budding – organisms grow an new little copy of themselves. It falls off and lives on its own. Examples: •Yeast •Potatoes •Hydra •Coral •Sponges •Sea Anenomes
- 22. Examples of asexual reproduction: Runners A stem that grows along the ground from which a new plant and root system grow.
- 23. Examples of asexual reproduction: Cuttings
- 24. Examples of asexual reproduction: Fragmentation and Regeneration Fragmentation - The piece that broke off creates a new organism. Regeneration - The organism regrows the missing piece
- 25. Video Link 1 Video Link 2
- 26. Examples of asexual reproduction: Parthenogenesis Oleandar Aphid – females give birth to live young that are genetically identical to themselves. No males exist. New Mexico Whiptail Lizard lays eggs that were created by parthenogenesis. They are clones of the mother. 'Virgin Birth' By Shark Confirmed: Second Case Ever ScienceDaily (Oct. 11, 2008) — Scientists have confirmed the second-ever case of a “virgin birth” in a shark, indicating once again that female sharks can reproduce without mating and raising the possibility that many female sharks have this incredible capacity.
- 27. Pros and Cons of Sexual and Asexual Reproduction PRO CON Sexual More disease resistant - Have different DNA so if disease wipes out some individuals others may have the genes to resist the infection. Slower - With many animals and plants it can only occur once a year. Organism is in the immature form longer. Asexual Quicker - With many animals and plants it can occur all year long and does not depend on the presence of a male. Thus it can produce more offspring quicker and sooner. Less disease resistant. Have the same DNA so if one individual can get it then all can.