In female kangaroos (marsupials),multiple choice the paternal x chromosome is always inactivated into a barr body. neither the maternal or paternal x chromosome is inactivated into a barr body. either the maternal or paternal x chromosome is randomly inactivated into a barr body. both the maternal and paternal x chromosomes are inactivated into a barr body, but only in about 50% of the total cells. the maternal x chromosome is always inactivated into a barr body.

The paternal X chromosome is always inactivated into a Barr body.

Explanation:

Marsupials also balance the number of  X linked genes present in male and females by inactivation of one X chromosome in their females. Kangaroos and other marsupials exhibit inactivation of the paternal X chromosome. In marsupials, the paternal X chromosome is always inactivated and is present in the form of the Barr body in the cells of the females.

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consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.