All female mammals have one active x chromosome per cell instead of two. what causes this?

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Answer 1

Answer:

Answer:

maybe its because of pregnancy

Explanation:

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1.Which of the following will occasionally produce a duplicate gene? A-chromosome replication during mitosis B-Crossing-over during meiosis C-neutral mutation during Transcription D-genetic drift during reproduction

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Homologous chromosomes exchange DNA during meiosis in a process called crossing-over. Crossing-over sometimes involves an unequal swapping of DNA. Therefore the answer is B.

The answer is crossing over, or B

The powerhouse of the cell: that is a term used to describe the ______________, because it's main function is to produce energy for cellular activities.

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The powerhouse of the cell: That is a term used to describe the MITOCHONDRIA, because its main function it to produce energy for cellular activities.

Mitochondria is the host of cellular respiration. This is where the Mitochondria take in glucose and oxygen to produce energy and is distributed all throughout the body as energy-rich molecules of ATP.

Which biological molecule is associated with iron (Fe) ions?A. Histone
B. Catalase
C. Chlorophyll
D. Hemoglobin
E. RNA polymerase

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D) hemoglobin. It uses the iron ion to attract oxygen.

The study of which structure was instrumental in the formulation of the modern cell theory? A. plant cell
B. animal cell
C. cell membrane
D. DNA molecule

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The study of the DNA molecule was instrumental in the formulation of the modern cell theory.

The contemporary cell theory, a key idea in biology, asserts that all living things are made up of one or more cells, that cells are the essential building blocks of life, and that all cells develop from already-existing cells. This notion was developed in large part as a result of research into the DNA molecule.

Significant insights into the mechanisms underpinning cellular operations and heredity have been gained through understanding DNA's structure, function, and involvement in genetic inheritance. The notion that cells are the basic unit of life and carry the genetic information essential for an organism's growth, development, and survival was further cemented by findings linked to DNA replication, gene expression, and mutations.

As a result, the comprehensive and widely embraced contemporary cell theory was made possible by research into the DNA molecule.

To know more about DNA here brainly.com/question/16099437

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A cell wall was instrumental. Hope I helped!

If an enzyme is absent during polypeptide production, what can occur?

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I think the answer is mutation!

Answer: mutation .
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This is the science of correct reasoning. The basic components are statements that can be true or false, but never both.

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Answer:

The basic components are statements that can be true or false, but never both. Magnetic Resonance Imaging This is a non-invasive body imaging procedure that uses powerful magnets and radio waves to construct pictures of the internal structures of the body.

Explanation:

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