This happens early in embryonic development in females, where one of the two X-Chromosomes is randomly (and permanently) inactivated, as you said, in cells other than egg cells.
This phenomonon is actually called X-Inactivation.
X-Inactivation make sure that females, just like males, have a single functional copy of the X Chromosome in each and every one of their cells in their body.
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Answer:
Cardiac muscle tissue
Explanation:
Myocardium or heart muscle is a special type of muscle (differ than striated and smooth) and it is the main tissue of the walls of the heart.
Heart muscle consists of individual heart muscle cells (cardiomyocytes) which are joined together by intercalated discs. It also contains collagen fibres and other substances that form the extracellular matrix.
Heart muscle has a "special" mode of contraction: action potential triggers the release of calcium ions from the cell's internal store, the sarcoplasmic reticulum.
Mercury has the smallest orbit and neptune has the largest. so neptune would take a longer amount of time to orbit the sun.
Answer:
Meiosis | Ploidy | Life Cycles | Phases of Meiosis | Prophase I | Metaphase I ... (for example, one diploid 2n cell producing two diploid 2n cells; one haploid n cell producing ... is sporophyte, while pollen and ovaries contain the male and female ...
Explanation:
Answer: Your answer is B
Explanation: Because unicellular organism are very simple organisms such as bacteria.