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If twins are a boy and a girl, clearly they are fraternal twins, as they do not have the same DNA. A boy has XY chromosomes and a girl has XX chromosomes. Girl-boy twins occur when one X egg is fertilized with an X sperm, and a Y sperm fertilizes the other X egg.
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Answer:
No
In RNA their arn't any base pairs but instead there are simply one base pairs, so any cytosine and guanine molecule are not related to each other at all, and thereby they don't have to be the same amounts.
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The evolution of plant communities at a site over time- from pioneer species to climax vegetation. • At each stage of the succession the plant community. hope it will help you
