Do Now: # _____ What do you think you will see under the microscope? Make some drawings.
A collection of posts from a 7th grade science teacher. Enjoy.
Monday, October 31, 2011
Wednesday, October 19, 2011
chromosomes and meoisis and mitosis
Organism | Scientific name | Diploid number of chromosomes | Notes |
---|---|---|---|
Helminthostachys zeylanica | 94 | ||
Adders-tongue | Ophioglossum reticulatum | 1200 or 1260 | This fern has the highest known chromosome number. |
African Wild Dog | Lycaon pictus | 78[1] | |
Alfalfa | Medicago sativa | 32[2] | Cultivated alfalfa is tetraploid, with 2n=4x=32. Wild relatives have 2n=16.[2] |
American Badger | Taxidea taxus | 32 | |
American Marten | Martes americana | 38 | |
American Mink | Neovison vison | 30 | |
Aquatic Rat | Anotomys leander | 92[3] | Tied for highest number in mammals with Ichthyomys pittieri. |
Barley | Hordeum vulgare | 14[2] | |
Bat-eared Fox | Otocyon megalotis | 72[1] | |
Bean | Phaseolus sp. | 22[2] | All species in the genus have the same chromosome number, including P. vulgaris, P. coccineus, P. acutifolis, and P. lunatus.[2] |
Beaver (American) | Castor canadensis | 40 | |
Beaver (Eurasian) | Castor fiber | 48 | |
Beech Marten | Martes foina | 38 | |
Bengal Fox | Vulpes bengalensis | 60 | |
Bittersweet nightshade | Solanum dulcamara | 24[4][5] | |
Black nightshade | Solanum nigrum | 72[6] | |
Cabbage | Brassica oleracea | 18[2] | Broccoli, cabbage, kale, kohlrabi, brussels sprouts, and cauliflower are all the same species and have the same chromosome number.[2] |
Capuchin Monkey | Cebus x | 54[7] | |
Carp | 104 | ||
Cat | Felis catus | 38 | |
Chicken | Gallus gallus domesticus | 78 | |
Chimpanzee | Pan troglodytes | 48 [8] | |
Chinchilla | Chinchilla lanigera | 64 [9] | |
Coatimundi | 38 | ||
Cotton | Gossypium hirsutum | 52[2] | 2n=4x; Cultivated upland cotton is derived from an allotetraploid |
Cow | Bos primigenius | 60 | |
Coyote | Canis latrans | 78[1] | |
Crab-eating rat (semiaquatic rodent) | Ichthyomys pittieri | 92[3] | Tied for highest number in mammals with Anotomys leander. |
Deer Mouse | Peromyscus maniculatus | 48 | |
Dhole | Cuon alpinus | 78 | |
Dingo | Canis lupus dingo | 78[1] | |
Dog | Canis lupus familiaris | 78[10] | 76 autosomal and 2 sexual.[11] |
Dolphin | Delphinidae Delphis | 44 | |
Donkey | Equus africanus asinus | 62 | |
Dove | 78[12] | Based on African collared dove | |
Duck-billed Platypus | 52 | ||
Earthworm | Lumbricus terrestris | 36 | |
Echidna | 63/64 | 63 (XXY, male) and 64 (XXXX, female) | |
Elephant | 56 | ||
Elk (Wapiti) | Cervus canadensis | 68 | |
Eurasian Badger | Meles meles | 44 | |
European honey bee | Apis mellifera | 32 | 32 for females, males are haploid and thus have 16. |
European Mink | 38 | ||
European Polecat | Mustela putorius | 40 | |
Fennec Fox | Vulpes zerda | 64[1] | |
Ferret | Mustela putorius furo | 40 | |
Field Horsetail | Equisetum arvense | 216 | |
Fisher (animal) | 38 | a type of marten | |
Fossa | Cryptoprocta ferox | 42 | |
Fruit fly | Drosophila melanogaster | 8[13] | 6 autosomal, and 2 sexual |
Giraffe | Giraffa camelopardalis | 62 | |
Goat | 60 | ||
Golden Jackal | Canis aureus | 78[1] | |
Gorilla | 48 | ||
Grape ferns | Sceptridum | 90 | |
Gray Fox | Urocyon cinereoargenteus | 66[1] | |
Gypsy moth | 62 | ||
Hare[14][15] | 48 | ||
Hawkweed | 8 | ||
Hedgehog Genus Atelerix (African hedgehogs) | 90 | ||
Hedgehog Genus Erinaceus (Woodland hedgehogs) | 88 | ||
Horse | Equus ferus caballus | 64 | |
Human | Homo sapiens | 46[16] | 44 autosomal and 2 sex |
Husk Tomato | Physalis pubescens | 24[17] | |
Hyena | 40 | ||
Jack jumper ant | Myrmecia pilosula | 2[18] | 2 for females, males are haploid and thus have 1; smallest number possible. Other ant species have more chromosomes.[18] |
Kangaroo | 16 | This includes several members genus Macropus, but not the red kangaroo (M. rufus, 40)[19] | |
Kit Fox | 50 | ||
Lion | Panthera leo | 38 | |
Long-nosed Cusimanse (a type of mongoose) | 36 | ||
Maize | Zea mays | 20[2] | |
Maned Wolf | Chrysocyon brachyurus | 76 | |
Mango | Mangifera indica | 40[2] | |
Meerkat | 36 | ||
Moonworts | Botrychium | 90 | |
Mosquito | Aedes aegypti | 6[20] | The 2n=6 chromosome number is conserved in the entire family Culicidae, except in Chagasia bathana which has 2n=8.[20] |
Mouse | Mus musculus | 40 | |
Mule | 63 | semi-infertile | |
Nagaho-no-natsu-no-hana-warabi | Botrypus strictus | 88 | B. strictus and B. virginianus have been shown to be paraphyletic in the genus Botrypus |
Oats | Avena sativa | 42[2] | This is a hexaploid with 2n=6x=42. Diploid and tetraploid cultivated species also exist.[2] |
Orangutan | 48 | ||
Oriental Small-clawed Otter | Aonyx cinerea | 38 | |
Pea | Pisum sativum | 14[2] | |
Pig | 38 | ||
Pigeon | 80 | ||
Pine Marten | 38 | ||
Pineapple | Ananas comosus | 50[2] | |
Platypus | Ornithorhynchus anatinus | 52 [21] | Ten sex chromosomes. |
Porcupine | Erethizon dorsatum | 34 [9] | |
Potato | Solanum tuberosum | 48[2] | This is a tetraploid; wild relatives mostly have 2n=24.[2] |
Rabbit | 44 | ||
Raccoon (Procyon lotor) | 38[22] | ||
Raccoon Dog | Nyctereutes procyonoides | 56 | |
Raccoon Dog | Nyctereutes viverrinus | 42 | some sources say sub-species differ with 38, 54, and even 56 chromosomes |
Radish | Raphanus sativus | 18[2] | |
Rat | 42 | ||
Rattlesnake fern | Botrypus virginianus | 184 | |
Red Deer | Cervus elaphus | 68 | |
Red Fox | Vulpes vulpes | 34[1] | Plus 3-5 microsomes. |
Red Panda | 36 | ||
Reeves's Muntjac | Muntiacus reevesi | 46 | |
Rhesus Monkey | 42[23] | ||
Rice | Oryza sativa | 24[2] | |
Rye | Secale cereale | 14[2] | |
Sable | 38 | ||
Sable Antelope | 46 | ||
Sea Otter | 38 | ||
Sheep | 54 | ||
Shrimp | Penaeus semisulcatus | 86-92 [24] | |
Slime Mold | Dictyostelium discoideum | 12 [25] | |
Snail | 24 | ||
Spotted Skunk | 64 | ||
Starfish | 36 | ||
Striped skunk | 50 | ||
Swamp Wallaby | Wallabia bicolor | 10/11 | 10 for male, 11 for female |
Tanuki/Raccoon Dog | Nyctereutes procyonoides albus | 38 | |
Thale Cress | Arabidopsis thaliana | 10 | |
Tibetan fox | 36 | ||
Tiger | Panthera tigris | 38 | |
Tobacco | Nicotiana tabacum | 48[2] | Cultivated species is a tetraploid.[2] |
Turkey | 82 | ||
Virginia Opossum | Didelphis virginiana | 22[26] | |
Wheat | Triticum aestivum | 42[2] | This is a hexaploid with 2n=6x=42. Durum wheat is Triticum turgidum var. durum, and is a tetraploid with 2n=4x=28.[2] |
White-tailed deer | Odocoileus virginianus | 70 | |
Wolf | 78 | ||
Wolverine | 42 | ||
Woolly Mammoth | 58 | extinct; tissue from a frozen carcass | |
Yeast | 32 | ||
Yellow Mongoose | 36 |
Chromosome Numbers in Different Species | |
Common Name | Genus and Species | Diploid Chromosome Number |
---|---|---|
Buffalo | Bison bison | |
Cat | Felis catus | |
Cattle | Bos taurus, B. indicus | |
Dog | Canis familiaris | |
Donkey | E. asinus | |
Goat | Capra hircus | |
Horse | Equus caballus | |
Human | Homo sapiens | |
Pig | Sus scrofa | |
Sheep | Ovis aries |
Advanced and Supplemental Topics |
Monday, October 17, 2011
Monday, October 10, 2011
Tuesday, October 4, 2011
Protists - Do Now #13
Do Now #13: Now that endosymbiosis has happened draw what you think living EUKARYOTIC organisms looked like.
Kingdom Protista:
Protista = the very first
all Eukaryotic
Protists belong to the Kingdom Protista, which includes mostly unicellular organisms that do not fit into the other kingdoms.
Characteristics of Protists
They all need some kind of a water-based environment--which can be fresh or marine water, snow, damp soil, polar bear hairs--in which to live. All are aerobic and have mitochondria to do cellular respiration, and some have chloroplasts and can do photosynthesis.
Plantlike Protists - also called algae - autotrophs
Funguslike Protists - heterotrophs, decomposers, external digestion
The transition to eukaryotic cells appears to have occurred during the Proterozoic Era, about 1.2 to 1.5 billion years ago. However, recent genetic studies suggest eukaryotes diverged from prokaryotes closer to 2 billion years ago. Fossils do not yet agree with this date. The old Kingdom Protista, as I learned it long ago, thus contains some living groups that might serve as possible models for the early eukaryotes. This taxonomic kingdom has been broken into many new kingdoms, reflecting new studies and techniques that help elucidate the true phylogenetic sequence of life on Earth.
http://faculty.southwest.tn.edu/rburkett/kingdom_protista.htm
Protists belong to the Kingdom Protista, which includes mostly unicellular organisms that do not fit into the other kingdoms.
Characteristics of Protists
They all need some kind of a water-based environment--which can be fresh or marine water, snow, damp soil, polar bear hairs--in which to live. All are aerobic and have mitochondria to do cellular respiration, and some have chloroplasts and can do photosynthesis.
Plantlike Protists - also called algae - autotrophs
Funguslike Protists - heterotrophs, decomposers, external digestion
The transition to eukaryotic cells appears to have occurred during the Proterozoic Era, about 1.2 to 1.5 billion years ago. However, recent genetic studies suggest eukaryotes diverged from prokaryotes closer to 2 billion years ago. Fossils do not yet agree with this date. The old Kingdom Protista, as I learned it long ago, thus contains some living groups that might serve as possible models for the early eukaryotes. This taxonomic kingdom has been broken into many new kingdoms, reflecting new studies and techniques that help elucidate the true phylogenetic sequence of life on Earth.
Kingdom Protista:
Protista = the very first
all Eukaryotic
Protists belong to the Kingdom Protista, which includes mostly unicellular organisms that do not fit into the other kingdoms.
Characteristics of Protists
They all need some kind of a water-based environment--which can be fresh or marine water, snow, damp soil, polar bear hairs--in which to live. All are aerobic and have mitochondria to do cellular respiration, and some have chloroplasts and can do photosynthesis.
- mostly unicellular, some are multicellular (algae)
- can be heterotrophic or autotrophic
- most live in water (though some live in moist soil or even the human body)
- ALL are eukaryotic (have a nucleus)
- A protist is any organism that is not a plant, animal or fungus
- how they obtain nutrition
- how they move
Plantlike Protists - also called algae - autotrophs
Funguslike Protists - heterotrophs, decomposers, external digestion
The transition to eukaryotic cells appears to have occurred during the Proterozoic Era, about 1.2 to 1.5 billion years ago. However, recent genetic studies suggest eukaryotes diverged from prokaryotes closer to 2 billion years ago. Fossils do not yet agree with this date. The old Kingdom Protista, as I learned it long ago, thus contains some living groups that might serve as possible models for the early eukaryotes. This taxonomic kingdom has been broken into many new kingdoms, reflecting new studies and techniques that help elucidate the true phylogenetic sequence of life on Earth.
http://faculty.southwest.tn.edu/rburkett/kingdom_protista.htm
Protists belong to the Kingdom Protista, which includes mostly unicellular organisms that do not fit into the other kingdoms.
Characteristics of Protists
They all need some kind of a water-based environment--which can be fresh or marine water, snow, damp soil, polar bear hairs--in which to live. All are aerobic and have mitochondria to do cellular respiration, and some have chloroplasts and can do photosynthesis.
- mostly unicellular, some are multicellular (algae)
- can be heterotrophic or autotrophic
- most live in water (though some live in moist soil or even the human body)
- ALL are eukaryotic (have a nucleus)
- A protist is any organism that is not a plant, animal or fungus
- how they obtain nutrition
- how they move
Plantlike Protists - also called algae - autotrophs
Funguslike Protists - heterotrophs, decomposers, external digestion
The transition to eukaryotic cells appears to have occurred during the Proterozoic Era, about 1.2 to 1.5 billion years ago. However, recent genetic studies suggest eukaryotes diverged from prokaryotes closer to 2 billion years ago. Fossils do not yet agree with this date. The old Kingdom Protista, as I learned it long ago, thus contains some living groups that might serve as possible models for the early eukaryotes. This taxonomic kingdom has been broken into many new kingdoms, reflecting new studies and techniques that help elucidate the true phylogenetic sequence of life on Earth.
Monday, October 3, 2011
DNA - Do Now 12
Do Now #12 What is DNA and what does it do?
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms
http://www.dnai.org/
The genes carry the instructions for making all the thousands of proteins that are found in a cell. The proteins in a cell determine what that cell will look like and what jobs that cell will do.
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms
http://www.dnai.org/
The genes carry the instructions for making all the thousands of proteins that are found in a cell. The proteins in a cell determine what that cell will look like and what jobs that cell will do.
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