In female mammals, the X chromosome that gets inactivated is the one that encodes the gene for Xist.

Here's a step-by-step explanation:

1. Each female mammal cell contains two X chromosomes, one from the mother and one from the father.

2. Early in development, one of these X chromosomes is randomly chosen to be inactivated in each cell. This process is called X-chromosome inactivation.

3. The Xist gene (X-inactive specific transcript) plays a crucial role in this process. This gene is located on the X chromosome and produces a molecule called Xist RNA.

4. The X chromosome that produces the Xist RNA coats itself with this molecule, which triggers its own inactivation.

5. Therefore, the X chromosome that encodes the gene for Xist is the one that gets inactivated.

6. The inactivated X chromosome condenses into a structure called a Barr body and does not express its genes. The other X chromosome remains active and expresses its genes.

7. This process ensures that females, like males, have one functional copy of the X chromosome in each body cell.

Question

In female mammals, the X chromosome that gets inactivated is the one that encodes the gene for Xist.

Here's a step-by-step explanation:

1. Each female mammal cell contains two X chromosomes, one from the mother and one from the father.

2. Early in development, one of these X chromosomes is randomly chosen to be inactivated in each cell. This process is called X-chromosome inactivation.

3. The Xist gene (X-inactive specific transcript) plays a crucial role in this process. This gene is located on the X chromosome and produces a molecule called Xist RNA.

4. The X chromosome that produces the Xist RNA coats itself with this molecule, which triggers its own inactivation.

5. Therefore, the X chromosome that encodes the gene for Xist is the one that gets inactivated.

6. The inactivated X chromosome condenses into a structure called a Barr body and does not express its genes. The other X chromosome remains active and expresses its genes.

7. This process ensures that females, like males, have one functional copy of the X chromosome in each body cell.

Knowee AI · Accepted Answer

In female mammals, the X chromosome that gets inactivated is the one that encodes the gene for Xist.

Here's a step-by-step explanation:

1. Each female mammal cell contains two X chromosomes, one from the mother and one from the father.

2. Early in development, one of these X chromosomes is randomly chosen to be inactivated in each cell. This process is called X-chromosome inactivation.

3. The Xist gene (X-inactive specific transcript) plays a crucial role in this process. This gene is located on the X chromosome and produces a molecule called Xist RNA.

4. The X chromosome that produces the Xist RNA coats itself with this molecule, which triggers its own inactivation.

5. Therefore, the X chromosome that encodes the gene for Xist is the one that gets inactivated.

6. The inactivated X chromosome condenses into a structure called a Barr body and does not express its genes. The other X chromosome remains active and expresses its genes.

7. This process ensures that females, like males, have one functional copy of the X chromosome in each body cell.

In female mammals, which X chromosome is inactivated?Group of answer choicesThe one that does not contain the gene for XistThe one that is used as a template to synthesize XistAny chromosome that does not synthesize XistThe one that encodes the gene for XistThe one that is composed of chromatin

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