Asexual Reproduction vs Sexual Reproduction
1457325380111000 Asexual Reproduction vs Sexual ReproductionRequires ____________________Requires two parentsProduces offspring_____________to the parent.Produces offspring _____________ from the parents.Can produce_________ offspring very ______Requires _________ time and ____________to produce offspringResults in limited ____________within a speciesResults in lots of ________________ within a speciesMitosis is one form of asexual reproduction and results in offspring that are _____________ to parentMeiosis is used to produce specialized sex cells called __________________: ___________(from males) and ___________ (from females), which combine to produce a new individual.How SEX Works: Two Parents Genetic Diversity33909001073150015906751835150021621752273300Zygote:____________________00Zygote:____________________51339754819650020955019304000045339002082799Embryo: Forms from the Zygote due to __________ 00Embryo: Forms from the Zygote due to __________ Process of Fertilization:single sperm penetrates the outer covering of the ______________ (egg)Nuclei of sperm and ovum fuse = single __________________cell is formedThe fertilized cell is called a ____________________. The zygote begins to divide by _________________ producing more cells. Once a zygote becomes two cells, it is called an _________________. The embryo increases in size by further cell division (mitosis) and eventually develops specialized cells which make up various body structures in an organism.3886200-176530DNA in Body Cells and MitosisChromosomes are DNA!Chromosomes contain genetic informationMitosis ensures all cells in the body (except sex cells) have the same DNA and the same number and kind of chromosomesMitosis occurs in somatic or ______________ cellsEx: right23558500Diploid CellsEvery organism has its own unique number of chromosomes. Humans have _______________. This is called its diploid number or the total number of chromosomes in a body cell.Diploid means “2 ____________” and is written as “2n”.Body cells of adult organisms have 2 sets of (matching) chromosomes – called _______________________ chromosomes1 set from female parent gamete and 1 set from male parent gameteWhat’s Essential to Sexual Reproduction?______________________________________________________________________________________________________________________________________________________________________Success after fertilization requires:External FertilizationWhat is it? PROSLess ____________ needed to find mateLarge number of _______________CONSExposure to the outside world___________ do not care for offspring – many offspring do not survive to adulthoodInternal FertilizationWhat is it? PROS_____________ develops inside female, protected and ________________Offspring raised by parents for _________ or ________CONSRequires more _____________ to find mate and perform ___________ _______________________ zygotes producedPollen TransportPurpose: Increase Genetic DiversityMove ___________ or ____________ away from parent (as far away as possible)Genes spread around rather than remaining near parent_____________ (containing ____________) released and carried by __________ to female parts_____________ (containing ____________) carried in fruit, eaten by animals and dispersed in feces to form new plants that grow away from parent plants so less competition for food and other resources which increases survival of offspringView Video: Continuation of LifeExit Reflection:What is an advantage of sexual reproduction and a disadvantage? Use a specific example to explain.What is the difference between an ovum, embryo and a zygote?Why do humans have two copies of each chromosome in each body cell? What process is responsible for combining the two sets of chromosomes? ................
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