If polar cytoplasm is transplanted into the anterior end of the egg just after fertilization, what will happen to nuclei that migrate into this cytoplasm at the anterior pole?

Since the polar cytoplasm contains information to form germ cells, germ cells would form in the anterior region.

Since the polar cytoplasm contains information to form thoracic segments, legs would form on the head.

Since the products of maternal effect genes are placed directly into nuclei of the developing embryo, the fate of these cells will depend on what maternal products are present and their relative amounts.

Since nuclei are not affected by cytoplasm, the resulting cells would retain their original fate.

Question

Biology

Alexa Odonnell

1 January, 21:54

If polar cytoplasm is transplanted into the anterior end of the egg just after fertilization, what will happen to nuclei that migrate into this cytoplasm at the anterior pole?

Since the polar cytoplasm contains information to form germ cells, germ cells would form in the anterior region.

Since the polar cytoplasm contains information to form thoracic segments, legs would form on the head.

Since the products of maternal effect genes are placed directly into nuclei of the developing embryo, the fate of these cells will depend on what maternal products are present and their relative amounts.

Since nuclei are not affected by cytoplasm, the resulting cells would retain their original fate.

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Answers (1)

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Ellen Conner · Answer 1

The answer is the first option: Since the polar cytoplasm contains information to form germ cells, germ cells would form in the anterior region.

Explanation:

If polar cytoplasm is transplanted into the anterior end of the egg just after fertilization, pole cells will develop there at the anterior end, as much as they would normally develop if they are transplanted to the posterior end of an egg. Usually, Polar cytoplasm is localized at the posterior end of eggs through maternal genes.