Meiosis Practice quiz

a cell that contains both sets of homologous chromosomes.

diploid

specialized cell involved in sexual reproduction (egg or sperm)

gamete

Nondisjunction occurs when

members of a chromosome pair fail to separate.

Which of the following does not enhance genetic diversity?

mitosis of somatic cells

In females, meiosis results in one egg cell, containing most of the cytoplasm, and three polar bodies.

one allele for each gene.

During which stage of meiosis do synapsis and the formation of tetrads occur?

prophase I

Which of the following is a difference between mitosis and meiosis?

-In meiosis four daughter cells are produced, whereas in mitosis two daughter cells are produced. -Mitosis but not meiosis occurs in somatic cells. -In mitosis cytokinesis occurs once, whereas in meiosis cytokinesis occurs twice. -Cells produced by mitosis are diploid; cells produced by meiosis are haploid.

formed when an egg is fertilized by a sperm cell

zygote

nuclear envelope disappers, chromatin coils up into chromosomes and homologous pairs of chromosomes match up

Prophase I

Nuclear envlope forms around each set of haploid chromosomes, cytokinesis begins forming 4 gametes

Telophase I

In humans, the haploid number of chromosomes is 23. Independent assortment has the possibility of producing _____ different gametes.

2 to the power of 23

How many pairs of autosomes do humans have?

22

Given this information about dogs diploid number of chromosomes(2n=78). A dogs gamete would contain _____ chromosomes.

39

An organism has a haploid chromosome number n = 4. How many tetrads will form during meiosis?

4

Each cell in an individual with Down syndrome contains ____ chromosomes

47

Which one of the following choices best describes the behavior of a tetrad during anaphase I of meiosis?

It splits into two pairs of sister chromatids, and one pair goes to each pole of the dividing cell.

functions to separate the homologous pairs of chromosomes creating two haploid cells

Meiosis I

Separates sister chromatids in two cells creating 4 haploid gametes

Meiosis II

Tetrads are lined up at the equatorial plate of the cell in the middle of the spindle

Metaphase I

Sister chromatids are lined up at the equatorial plate of the cell in the middle of the spindle

Metaphase II

process where homologous chromosomes exchange portions of their chromatids during meiosis.

crossing over

cell that contains only a single set of chromosomes; contains 1/2 the genes

haploid

chromosome with genetic information corresponding to opposite sex parent

homologous chromosomes

structure with 4 chromatids that forms during meiosis and is another name for homologous chromosomes

tetrad