Meiosis

How does meiosis contribute to genetic variation?

• By producing identical daughter cells

• Through independent assortment of chromosomes and crossing over during Prophase I

• By replicating DNA without division

• By ensuring all genes are expressed equally

Tags

NGSS.HS-LS3-2

What is the outcome of Meiosis II?

• Two diploid daughter cells, each with paired chromosomes.

• Four haploid daughter cells, each with individual chromatids, following the separation of sister chromatids.

• One diploid daughter cell with duplicated chromosomes.

• Three haploid daughter cells and one diploid daughter cell.

What happens during Metaphase I?

• Homologous chromosome pairs are aligned at the equatorial plane of the cell, attached to spindle fibers.

• Sister chromatids are separated and pulled to opposite poles of the cell.

• Chromosomes are replicated and begin to condense.

• The nuclear envelope re-forms around each set of chromosomes.

Tags

NGSS.HS-LS1-4

What is Telophase II?

• The stage of meiosis where chromosomes are duplicated.

• The final stage of meiosis where the nuclear envelope reforms around each set of chromosomes, resulting in four distinct haploid cells.

• The phase of cell division where sister chromatids are separated.

• The initial stage of meiosis where homologous chromosomes pair up.

What is Anaphase I?

• The stage where sister chromatids are separated to opposite poles of the cell.

• The stage where homologous chromosomes are pulled apart to opposite poles of the cell.

• The stage where DNA is replicated before cell division.

• The stage where the nuclear envelope reforms around the separated chromosomes.

What is a tetrad?

• A structure containing two chromatids that forms during Metaphase I.

• A structure containing four chromatids that forms during Prophase I when homologous chromosomes pair up.

• A type of cell division that results in two identical daughter cells.

• A genetic mutation that occurs during DNA replication.

Define homologous chromosomes.

• Homologous chromosomes are pairs of chromosomes, one from each parent, that are similar in shape, size, and genetic content.

• Homologous chromosomes are identical copies of a chromosome that are formed during DNA replication.

• Homologous chromosomes are chromosomes that have the same genetic sequence but are from different species.

• Homologous chromosomes are chromosomes that are completely different in structure and function.

What is the role of spindle fibers in meiosis?

• They are responsible for separating chromosomes and chromatids during the different phases of meiosis.

• They help in the formation of the nuclear envelope during telophase.

• They assist in the replication of DNA before meiosis begins.

• They are involved in the synthesis of ribosomes during cell division.

What is Meiosis?

• A type of cell division that reduces the chromosome number by half, resulting in four genetically diverse daughter cells.

• A process of DNA replication that occurs before cell division.

• A method of asexual reproduction in unicellular organisms.

• A stage of mitosis where chromosomes align at the cell's equator.

What occurs during Prophase I of Meiosis?

• Homologous chromosomes pair up and form tetrads, allowing for crossing over and genetic recombination.

• Sister chromatids separate and move to opposite poles of the cell.

• Chromosomes are replicated to form identical sister chromatids.

• Nuclear envelope breaks down and spindle fibers begin to form.