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inessss [21]
2 years ago
11

A new pest is found that only feeds on corn plant leaves. Livestock eat corn cobs. Which promoter would you choose if the modifi

ed gene produces toxins that are not safe for livestock to ingest?
Biology
1 answer:
aleksandrvk [35]2 years ago
8 0

Answer:

Promoter 2

Explanation:

Promoter 2 is the best choice because the resistance gene will only be expressed in the leaves of the corn plant. Promoter 3 only expresses genes in the corn roots, so the toxin would not be available in the leaves for the pest to eat. Promoters 1 and 4 would express the resistance gene in the leaves of the corn plant, but the toxins would be expressed in the corn cobs as well, which may then be fed to livestock.

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In garden peas, tall plants (T) are dominant to short plants (t), and round pods (R) are dominant to constricted pods (r). A tru
Nataliya [291]

Answer:

Based on the given information, the study of different varieties of the garden pea was done, that is, tall plants with round pods having homozygous genotype TTRR, and the short plants with constricted pods having homozygous genotype ttrr. Post crossing the mentioned varieties of garden pea, the F1 generation comprises tall plants with round pods having the genotype TtRr. While when the crossing of F1 generation plants was done, the plants obtained in the F2 generation demonstrated the phenotype, that is, tall plants with round pods, which is 75 in number and short plants with constricted pods, which is 24 in number.  

This shows that the genes would have been the linked genes, as they would have been situated very close together on the homologous chromosomes, and because of this linkage, the expression of the genes would have taken together.  

In case, if there was no linkage, then the genes would have assorted independently, and the offspring produced in the F2 generation would have shown the phenotypic ratio with the features of tall plants with round pods (9), short plants with round pods (3), tall plants with constricted pods (3), and short plants with constricted pods (1).  

Though the above-mentioned situation did not occur and the plants obtained in the F2 generation demonstrated the phenotype, that is, tall plants with round pods, which is 75 in number and short plants with constricted pods, which is 24 in number. This further puts more emphasis on the fact that the genes for both the phenotypes were linked due to which expression of only the mentioned two varieties took place and the other two failed to do so.  

5 0
3 years ago
I need the answer to these two questions please!
kramer

For question number 1, the answer is B.

For question nunber 2, the answer is D.

6 0
3 years ago
WILL GIVE A BRAINLEST
vodka [1.7K]
I believe i<span>mproving air circulation.

Hope this helps!</span>
4 0
3 years ago
Read 2 more answers
Stage of development for animals​
garik1379 [7]

Answer:

the beginning growth stage

6 0
2 years ago
Read 2 more answers
¿Qué ventajas crees que nos da tener un PH ácido en el estómago? ayuda porfavor
iren2701 [21]

Answer & explanation:

This acidity in our stomach is advantageous because it kills most bacteria and creates the ideal environment for the enzymes pepsin and gastric lipase to digest food.

The pH corresponds to the hydrogen potential of a solution, this potential can be classified as acid, basic or neutral.

Respuesta y explicación:

Esta acidez en nuestro estómago es ventajosa porque mata a la mayoría de las bacterias y crea el ambiente ideal para que las enzimas pepsina y lipasa gástrica digieran los alimentos.

El pH corresponde al potencial de hidrógeno de una solución, este potencial se puede clasificar como ácido, básico o neutro.

3 0
3 years ago
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