Which statement describes meiosis but not mitosis?

Which statement is true of mitosis but not of meiosis?

A student is sorting features into three columns: mitosis only, meiosis only, and both. Which feature belongs in the "both" column?

Which statement about crossing over is correct?

Which statement correctly describes independent assortment?

In meiosis, the DNA is replicated once before meiosis I and again before meiosis II.

Which event happens in meiosis II but not in meiosis I?

Which statement about cytokinesis in these two processes is correct?

A student wrote: "Mitosis produces the sperm and the egg cells." Which correction is needed?

Which row correctly pairs a process with the number of cell divisions it involves?

In metaphase of mitosis the chromosomes line up single file across the middle of the cell. How do they line up in metaphase I of meiosis?

Which statement about the daughter cells of the two processes is correct?

A human skin cell containing 46 chromosomes divides by mitosis. How many chromosomes does each daughter cell contain?

A cell in a human ovary containing 46 chromosomes completes meiosis. How many chromosomes does each of the resulting cells contain?

A fruit fly body cell has 8 chromosomes. Cells in the fly's ovary complete meiosis. How many chromosomes does each egg cell contain?

A corn plant has a diploid number of 20. A cell has just finished meiosis I. How many chromosomes are in each of the two cells before meiosis II begins?

An onion root tip cell with 16 chromosomes divides by mitosis, and each of its daughter cells then divides by mitosis again. How many chromosomes does each of the four cells contain?

A sperm cell of a certain frog contains 13 chromosomes. How many chromosomes are in one of that frog's body cells?

A cell with a diploid number of 12 undergoes meiosis. What is the result?

In a species with a diploid number of 24, an egg with the normal chromosome number is fertilized by a normal sperm. How many chromosomes does the zygote contain?

A cut in the skin closes as new cells replace the damaged ones, each carrying the same genetic information as the cells around it. Which process produces those cells?

A flowering plant makes pollen grains that will carry half of its genetic material to another flower. Which process makes the spores that grow into those pollen grains?

A gardener plants a cutting from a rose bush, and it grows into a plant genetically identical to the original. Which process builds the new stems and leaves?

A man's testes produce millions of sperm, each containing half the number of chromosomes found in his body cells. Which process is responsible?

Which job in the human body is carried out by mitosis rather than by meiosis?

A single-celled yeast buds off a daughter cell that has the same chromosome number as the parent. Which nuclear division comes before the bud separates?

Sexual reproduction keeps the chromosome number of a species the same from one generation to the next. Which process stops that number from doubling each generation?

A zygote must end up with a full set of chromosomes from each parent. Which pair of events, in order, produces it?

The four cells produced by meiosis differ genetically from one another, while the two produced by mitosis do not. What accounts for the difference?

Two brothers have the same parents but are not identical. Which event best explains why the egg and sperm that formed each brother carried different combinations of alleles?

A cell with 4 chromosomes, that is 2 homologous pairs, undergoes meiosis. Ignoring crossing over, how many genetically different kinds of gamete can independent assortment alone produce?

Crossing over adds variation in a way that independent assortment on its own cannot. Why?

The cells of a growing tumor arise by repeated mitosis and generally carry the same alleles as the cell they came from. Why?

Crossing over takes place during meiosis I and produces chromosomes with new combinations of alleles.

A species that reproduces only by mitosis and a species that reproduces sexually both meet a new disease. Why is the sexually reproducing population more likely to contain survivors?

A cell containing 8 chromosomes divides twice, with no copying of DNA between the first division and the second, and ends as four cells of 4 chromosomes each. Which process has taken place?

Under a microscope a student sees a cell in which the chromosomes are lined up in pairs, side by side, across the middle of the cell. Which division is this cell carrying out?

A cell with 12 chromosomes divides once and produces two cells that each contain 12 chromosomes. Which process was it?

Two cells lie side by side inside one structure. In each, 10 chromosomes are lined up single file across the middle, and the cell they both came from had 20 chromosomes. What is being observed?

A single-celled organism copies its one circular chromosome and splits into two identical cells without ever forming a spindle. Which process is this?