Biology, 18.10.2020 14:01, veraanna2015

What is a scientific theory? Make up your own scientific theory.

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Biology, 22.06.2019 12:40, crybaby222psyc

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Biology, 22.06.2019 15:00, rgilliam3002

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.

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Biology, 22.06.2019 15:40, mesposito

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.

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What is a scientific theory? Make up your own scientific theory....