Meiosis Quiz: Stages and Concepts

In early prophase I, each chromosome pairs with its ______ and crossing over occurs.

In metaphase I, pairs of homologs line up at the ______ plate.

During anaphase I, pairs of ______ chromosomes separate.

Cytokinesis usually occurs simultaneously with ______ I.

X-shaped regions called ______ are sites of crossovers.

In telophase I, each half of the cell has a haploid set of ______; each chromosome still consists of two sister chromatids.

No chromosome replication occurs between the end of meiosis I and the beginning of meiosis ______.

In animal cells, a cleavage ______ forms during cytokinesis.

Mutations are the original source of genetic ______.

Different versions of genes created by mutations are called ______.

The behavior of chromosomes during ______ and fertilization is responsible for variation.

Independent assortment of ______ is one mechanism that contributes to genetic variation.

Homologous pairs of chromosomes orient randomly at ______ I of meiosis.

The number of combinations possible when chromosomes assort independently is represented by ______.

For humans, with a haploid number of ______, there are over 8 million possible combinations of chromosomes.

One of the mechanisms that increases genetic variation is ______ over.

A gamete contains a single set of chromosomes and is thus a ______ cell.

The haploid number for humans is ______.

Meiosis reduces the number of chromosome sets from ______ to haploid.

Meiosis consists of two consecutive cell divisions known as meiosis ______ and meiosis II.

Each daughter cell at the end of meiosis has only half as many ______ as the parent cell.

In mitosis, sister chromatids __________ at the end of metaphase.

During __________ I, homologs separate.

In meiosis, cohesins are cleaved along the chromosome arms in __________ I.

The duplicated chromosomes line up during __________ in both mitosis and meiosis.

Sister chromatids separate during __________ II of meiosis.

The parent cell in mitosis has a chromosomal number of __________.

The process of __________ involves the duplication of chromosomes.

____________ allows sister chromatids to stay together during meiosis I.

During ______ I, nonsister chromatids are held together during synapsis.

The process of ______ and crossing over occurs during synapsis.

During meiosis, the ______ plate is where chromosomes align before separation.

In ______ I, the breakdown of proteins holding sister chromatid arms together occurs.

The result of crossing over is the formation of ______ chromosomes.

Chiasma formation occurs during ______ I of meiosis.

Sister chromatids are held together at the ______.

Anaphase ______ is where sister chromatids are separated and pulled towards opposite poles.

Crossing over produces recombinant chromosomes, which combine DNA inherited from each _____

Crossing over contributes to _____ variation by combining DNA from two parents into a single chromosome

In humans, an average of one to three crossover events occurs per _____

The pair of homologs forms a structure called a _____ during synapsis

After crossing over, chromosomes move to the _____ I plate

Nonsister chromatids are involved in _____ I of meiosis

Synapsis and crossing over facilitate genetic ____ in gametes