The first single celled life form appeared on earth roughly about 3.5 billion years ago
Answer: metaphase
Explanation:
The failure of sister chromatids to separate during meiosis II occurs in metaphase stage. This is called as nondisjunction, this will affect the normal distribution of chromosomal material to the daughter cells. This will result in a problem called aneuploidy. There are abnormal number of chromosome per cell.
<span>Macrophages work slowly apexBacteria reproduce quickly.</span>
George Mendel chose to use purebred plants in his experiments because they have a variety of traits.
Your answer would be $4 times $y.
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