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Name ___________________________ Date: ___________________ Course: Science/Ms. Lopez 80a Homeroom: Aims: SWBAT compare and contrast asexual and sexual reproduction SWBAT to list two advantages and two disadvantages for each type of reproduction Essential Question: Which type of reproduction is most beneficial to have? Do Now 1) How is a clone child born from asexual reproduction different from a child born from sexual reproduction? A. There is no difference B. A clone child has a different genetic make-up from its parent while a child born from sexual reproduction has the same genetic make-up from its parent. C. A clone child has the same genetic make-up from its parent and a child born from sexual reproduction has the same genetic make-up from its parent. D. A clone child has the same genetic make-up from its parent while a child born from sexual reproduction has different genetic make-up from its parent. 2) All of these are an example of asexual reproduction except: A. A sea star regenerating a new arm B. A mother dog giving birth C. A potato sprouting new plants from its buds D. A strawberry plant forming new plants with runners 3) Fern A has a chromosome that makes its leaves rough. Fern B has a chromosome that makes its leaves smooth. Fern A’s spore is planted in some soil and a new fern grows. Will the leaves of the new plant be smooth or rough? How do you know? __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ Shrimp cell: 86 chromosomes Sheep: 54 chromosomes Mosquito: 6 chromosomes Female gamete: ___________ Male gamete: ___________ Female gamete: ___________ STOP! Advantages of Asexual Reproduction Asexual reproduction can be very advantageous to certain animals. For instance, animals that remain in one particular place and are unable to look for mates would need to reproduce asexually. 1 2 NONE Another advantage of asexual reproduction is that numerous offspring can be produced without "costing" the parent a great amount of energy or time. Environments that are stable and experience very little change are the best places for organisms that reproduce asexually. The cloned offspring are more likely to succeed in the same stable areas as their parents. 1 2 NONE Asexual reproduction can create individuals rapidly and in large quantities. Secondly, bypassing the sexual process can help a plant in times of dryness since motile sperm require water to fertilize the egg. Another advantage lies in the fact that plants with the desired characteristics can be cloned for economic reasons (agriculture). Overall, asexual reproduction seems to be favored when rapid population growth is needed, and sexual reproduction is favored under changing conditions. List 3 advantages to asexual reproduction 1 2 NONE 1.) _________________________________________________________________________ 2.) __________________________________________________________________________ 3.) _________________________________________________________________________ Which advantage do you think is the most important? Why? _____________________ ____________________________________________________________________________ ____________________________________________________________________________ Disadvantages of Asexual Reproduction Although a sexless existence can have these advantages, it's generally a dangerous lifestyle, which carries a greater risk of extinction. Environmental changes are less hazardous to species that have sex. 1 2 NONE By mixing some momma chromosomes with some poppa chromosomes, sexual reproduction shuffles genes around, making individuals of a species more varied. A sexual species will be more resilient in a changing environment, because a few of their members might randomly have the right traits to survive. 1 2 NONE If each ant is exactly the same, adverse conditions, such as a new bacterial infection, could easily wipe them all out. If something goes wrong, such as the occurrence of a fatal mutation, the whole society of clones can be terminated. 1 2 NONE List 3 disadvantages to asexual reproduction 1.) ________________________________________________________________________ 2.) __________________________________________________________________________ 3.) _________________________________________________________________________ Summary – ASEXUAL REPRODUCTION Advantages Disadvantages 1.) ______________________________ 1.) ______________________________ ________________________________ ________________________________ ________________________________ ________________________________ 2.) ______________________________ 2.) ______________________________ ________________________________ ________________________________ ________________________________ ________________________________ 3.) ______________________________ 3.) ______________________________ ________________________________ ________________________________ ________________________________ ________________________________ Advantages of Sexual Reproduction Benefits of sexual reproduction revolve around increased genetic diversity. This increased diversity is good when conditions change and a population needs new combinations of genes to do well under the new conditions; when predators or competitors are evolving rapidly and the new gene combinations may help the population "keep up", and when the population is threatened with disease. In the latter case, at least some members of a genetically diverse population will be able to resist the 1 2 3 NONE disease. List 3 advantages to sexual reproduction 1.) ________________________________________________________________________ 2.) __________________________________________________________________________ 3.) _________________________________________________________________________ Disadvantages of Sexual Reproduction 1.) The need to find a mate (hard to do for sessile organisms or organisms with low population densities; 2. the time and energy required to find a mate and to copulate (this is time that could be spent eating or acquiring resources); 3. the exposure to predation (sometimes from the mate!) that comes with mating; 4. exposure to disease from the mate; 5. when an animal mates, only 1/2 of its genes go into each of the offspring, so the genes are "diluted"; 6. because some proportion of the population is male, not all adult organisms are directly producing offspring, thus lowering the rate of population growth; and 7. adaptive combinations of genes are lost. List 3 disadvantages to sexual reproduction 1.) _________________________________________________________________________ 2.) __________________________________________________________________________ 3.) _________________________________________________________________________ Summary – SEXUAL REPRODUCTION Advantages Disadvantages 1.) ______________________________ 1.) ______________________________ ________________________________ ________________________________ ________________________________ ________________________________ 2.) ______________________________ 2.) ______________________________ ________________________________ ________________________________ ________________________________ ________________________________ 3.) ______________________________ 3.) ______________________________ ________________________________ ________________________________ ________________________________ ________________________________ INDEPENDENT PRACTICE 1. By what process do starfish grow back lost arms? A. Budding B. Regeneration C. Binary fission 2. Why are the offspring of asexual reproduction called clones? __________________________________________________________________________________________ __________________________________________________________________________________________ S __________________________________________________________________________________________ 29. The following table describes one method each organism can use to reproduce. Methods of Reproduction 3. Organism Description Jellyfish A part of the parent breaks off and becomes a new jellyfish. Komodo dragon A female produces eggs that develop into young without a male. Swordtail fish A female lays eggs that were fertilized by a male. Bacterium The single-celled organism splits into two cells that are identical. Which organism reproduces sexually? A. Jellyfish B. Komodo dragon C. Swordtail fish D. Bacterium TURN PAGE 4. 5.) A student observes a unicellular organism under a microscope. After a while, the organism begins to split into two cells, as shown in the diagram. Which of these best describes the process shown in the diagram? A. binary fission B. meiosis C. osmosis D. sexual reproduction TURN PAGE from atmosphere falls into the B. the cloning stream. 1 C. sexual reproduction C. The stream water absorbs minerals D. asexual reproduction from the plants growing in it and along its banks. D. When water evaporates from the ocean, it takes minerals with it and redeposits them as rainwater into the stream. CCS-043A 3. SPEED (in meters/secon 3.0 2.5 2.0 bears are genetically different from each other and from their parents. These genetic differences A.2.) Polar Rainwater dissolves minerals out of 1.5 are the result of the rocks and soil during runoff. 1.0 A. mitosis 0.5 B. Rainwater that is high in minerals 0 minerals get into stream water? 3 4 14. asexually. One way to see if a given paramecium is the product of sexual or asexual reproduction is to A. see whether its genes are identical to those of its parent. B. check for traits that are beneficial to its survival. C. check for traits that are not beneficial to its survival. D. test it for acquired characteristics. 6 7 8 The graph shown above provides information about the motion of a bicy When is the bicycle’s acceleration the greatest? Paramecia reproduce both sexually and 5 TIME (in seconds) A. at 0 seconds only B. from 0 – 3 seconds C. from 3 – 8 seconds D. from 8 – 9 seconds 8SPPPF-026D CCD-105A 2 Name ___________________________ Course: Science/Ms. Lopez Date: ___________________ 80c Homeroom: Homework #80 – Due tomorrow In the picture above, there are 5 male deer and 100 female deer. Using the picture and the caption describing the picture above, write 4-6 sentences answering the following: • • • • Pretend- If you could decide how deer reproduced, what would you recommend for this odd deer population with five male deer and 100 female deer? (Sexual or Asexual reproduction) Explain your answer to the first bullet point What is an advantage of sexual reproduction Which reproduction would you choose if instead the population of deer was 100 male and 100 female (Sexual or Asexual reproduction) __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ Check your work. ____Did you capitalize the beginning of every sentence and all proper nouns? ____Did you spell every word correctly that is spelled correctly on the page? ____Did you punctuate the end of every sentence? ____Did you write in complete sentences? (Subject, predicate, and complete thought). TURN PAGE Name ___________________________ Date: ___________________ Course: Science/Ms. Lopez Homeroom: 42. Aaron is classifying the following organisms into animal groups. 80b S TURN PAGE Exit Slip #80 Asexual Reproduction Sexual Reproduction Advantage Advantage 1.) _______________________________________ 2.) _______________________________________ __________________________________________ __________________________________________ Gila Monster Which reasons can Aaron give for __________________________________________ Gila monster as a reptile? Frog classifying the frog as an amphibian and the __________________________________________ Disadvantage F. Disadvantage H. 3.) _______________________________________ t 5IFGSPHJTBOJOWFSUFCSBUF 4.) _______________________________________ t 5IFGSPHIBTDBSUJMBHF t 5IF(JMBNPOTUFSMBZTFHHT __________________________________________ t 5IF(JMBNPOTUFSMJWFTPO __________________________________________ __________________________________________ __________________________________________ land. G. J. 5.) Which explanation below do you think describes an advantagetto5IFGSPHMBZTFHHT sexual reproduction? t 5IFGSPHJTCPSOXJUIHJMMT t 5IF(JMBNPOTUFSIBT 5IF(JMBNPOTUFSJTDPME a. Sexually reproducing organisms can create new organisms with t new traits. scales. blooded. b. Sexually reproducing organisms can carry diseases to new organisms c. Sexually reproducing organisms can create new organisms with one parent d. Sexually reproducing organisms can have the same exact genes as parent 43. Which statement describes asexual and sexual reproduction? 6.) A. "TFYVBMJTPOFQBSUPGTFYVBMSFQSPEVDUJPO B. 4FYVBMSFQSPEVDUJPOIBQQFOTCFGPSFBTFYVBM C. "TFYVBMOFFETPOFQBSFOUBOETFYVBMOFFETUXPQBSFOUT D. 4FYVBMIBQQFOTPOMZJOBOJNBMTBOEBTFYVBMIBQQFOTPOMZJOQMBOUT 7) How are the offspring of organisms that produce A-Sexually different than those that reproduce sexually? _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ Page 25 GO ON