Mitotic cell division in unicellular eukaryotes can result in a cell that is:

A. 1n.
B. 2n.
C. Either 1n or 2n, depending on whether the
organism predominantly exists as a haploid
cell or a diploid cell.


C

Biology & Microbiology

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There is a population of frogs living in a pond, 25 are green, 25 are brown, 25 are yellow with green spots and 25 are all yellow. A drought occurred and 75% of the frogs died. The remaining frogs were green and brown, after 25 generations the frogs still were green and brown, yellow frogs never appeared in the population again. Which of the following best explains this phenomenon?

A. Sexual selection. B. Balancing selection. C. Bottleneck effect. D. Heterozygote advantage. E. Founder effect.

Biology & Microbiology

If you want to get DNA from a eukaryotic cell, which of the following structures would provide the largest concentration? 

A. ribosome B. nucleus C. mitochondria D. lysosome

Biology & Microbiology

The products of meiosis are:

A) two diploid cells. B) two haploid cells. C) four haploid cells. D) four diploid cells.

Biology & Microbiology

Suppose that an x-shaped structure containing DNA has just been separated into two equal parts during anaphase of mitosis. After the separation, what is each molecule called?

chromatin a chromosome a chromatid

Biology & Microbiology