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Crossing-Over video explanationSumanas Inc. Meiosis SimulatorSumanas Inc. Independent assortment simulator (Creating unique gametes) |
Utah Genetics - Introductory tour of DNA, Genes, and Chromosomes
DNA vs. Genes vs. ChromosomesTo the LEFT, BELOW and LEFT, and BELOW are 3 different representations of the same information. Each of these illustrations attempts to highlight the differences between DNA, genes, and chromosomes.
To help us understand, we can use a cookbook as an analogy. The individual letters and words can be thought of as being similar to the DNA code. Each recipe contains many words and is therefor analogous to a GENE (which is a specific section of DNA code). The cookbook itself contains all of the recipies, just as the CHROMOSOMES contain all of the genes. What would be a good analogy for the nucleus, which contains all of the chromosomes? |
BBC Bite Sized comparison of DNA, Genes, and Chromosomes.
Aphid reproduction....Ladies choice (video)
Asexual vs. Sexual reproduction - summary
Asexual vs. Sexual Reproduction - A comparison (from Teacher's Domain)
How much DNA to we have anyway?
A common citation for the length of DNA in our bodies is that one cell of DNA contains about 5 - 6 feet (2 meters) of DNA per cell. Estimates place the number of cells in our body at about 100 trillion in total. Not all of those cells contain DNA (blood cells do not, for example) so we can lower that number to perhaps 50 - 70 trillion DNA containing cells.
Let's take the lower estimate. 50 trillion x 6 ft = 300 trillion ft, or about 60 billion miles. Since the moon is 260,000 miles from us, then 60 billion / 260,000 = 218,000. In short, the DNA in one human body would stretch to the moon and back 109,000 times (at least).
Let's take the lower estimate. 50 trillion x 6 ft = 300 trillion ft, or about 60 billion miles. Since the moon is 260,000 miles from us, then 60 billion / 260,000 = 218,000. In short, the DNA in one human body would stretch to the moon and back 109,000 times (at least).
Mating Rituals (A variety of fish try to get a mate)
Bird of Paradise mating ritual
Simulation of Cells down to DNA
Genes, Chromosomes, and DNA (What exactly is the difference?)
Intro to Phenotype (video)
Allele introduction (video)
TeacherTube video (Asexual vs. Sexual Reproduction & Cell division)
Cells Alive - Mitosis simulator
An overview of
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