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olga nikolaevna [1]
3 years ago
12

To create a knockout mouse, after introducing to ES cells a DNA construct in which a specific gene is mutagenized by the inserti

on of a drug resistance marker, the cells Multiple Choice that have incorporated the transgene by homologous recombination grow in the presence of the drug and these are injected into a host blastocyst. that lack the transgene grow in the presence of the drug and these are injected into a host blastocyst. that have deleted the transgene grow in the presence of the drug and the nuclei are injected into a host blastocyst. that lack the transgene grow in the presence of the drug and the nuclei are used for nuclear transfer.
Biology
1 answer:
Varvara68 [4.7K]3 years ago
4 0
I’m not sure but if u get the answer I’ll like it
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Dosage compensation leads to a variety of interesting coat color patterns in certain mammals. For instance, a female cat that is
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Explanation:

The genetic determination of coat colors in calico cats is linked to the X chromosome wherein calicos are nearly always female, with one coat color  allele linked to the maternal X chromosome and a second coat color allele linked to the paternal X chromosome.

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4 years ago
Why is so little of the energy passed on?
iren2701 [21]

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Why is there less energy at each trophic level?

Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level. ... A food chain can usually sustain no more than six energy transfers before all the energy is used up.

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6 0
3 years ago
Is there likely to be a major earthquake -- 7 or above on the Richter scale -- in Brooklyn?
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