Meiosis

Meiosis

by Adam Lykens

Multiple Choice

Two chromosomes that are paired together (one comes from mom and one from dad) as a set are called what?

• centromeres

• sister chromatids

• homologous chromosomes

• daughter cells

Multiple Choice

Body cells (somatic cells) are __________, meaning they have both sets of homologous chromosomes in them.

• haploid

• diploid

• triploid

• tetraploid

Multiple Choice

Where do you get each of your homologous chromosomes from?

• You get both from your biological mother

• You get both from your biological father

• Your cells make them on their own

• You get 1 from your biological mother and 1 from your biological father

Multiple Choice

Sex cells (gametes like sperm and eggs) are _________, meaning the only have 1 copy of each chromosome.

• haploid

• diploid

• triploid

• tetraploid

Fill in the Blanks

Human body cells (somatic cells) have 46 chromosomes in them. How many chromosomes are in the sex cells (gametes) of humans?

Multiple Choice

During which phase are the chromosomes replicated?

• interphase

• Prophase I

• Prophase II

• Telophase

Multiple Choice

During which phase do homologous chromosomes pair up, forming a tetrad?

• Interphase

• Prophase I

• Metaphase I

• Telophase II

Multiple Choice

During which phase does crossing over-the swapping of genetic information from 1 homologous chromosome with another-occur?

• Interphase

• Prophase I

• G1 phase

• Prophase II

Multiple Choice

During which phase do homologous chromosome pairs (tetrads) line up down the middle of the cell?

• Interphase

• Prophase I

• Metaphase I

• Anaphase I

Multiple Choice

During which phase are the homologous chromosome pairs pulled to opposite poles of the cell by the spindle fibers?

• Interphase

• Prophase I

• Metaphase I

• Anaphase I

Match

Match the following phases of meiosis I with its description:

• Interphase

• Prophase I

• Metaphase I

• Anaphase I

Homologous chromosomes are replicated

Homologous chromosome pairs pair up with each other, and crossing-over occurs

Homologous chromosome pairs line up down the middle of the cell

Homologous chromosome pairs are moved toward opposite poles by the spindle fibers

• Homologous chromosomes are replicated

• Homologous chromosome pairs pair up with each other, and crossing-over occurs

• Homologous chromosome pairs line up down the middle of the cell

• Homologous chromosome pairs are moved toward opposite poles by the spindle fibers

Multiple Choice

At the end of meiosis I, the 2 daughter cells are ___________.

• haploid

• diploid

• triploid

• tetraploid

Multiple Choice

After meiosis I, and before meiosis II, the chromosomes are replicated.

• True

• False

Multiple Choice

During _________, chromosomes consisting of 2 sister chromatids become visible and the nuclear membrane starts to disappear.

• Prophase II

• Metaphase II

• Anaphase II

• Telophase II

Multiple Choice

During __________, the chromosomes line up down the middle of the cell.

• Prophase II

• Metaphase II

• Anaphase II

• Telophase II

Multiple Choice

During __________, the chromatids are separated and are moved toward opposite poles by the spindle fibers.

• Prophase II

• Metaphase II

• Anaphase II

• Telophase II

Multiple Choice

During __________, the nuclear membrane reappears around the 4 sets of chromosomes.

• Prophase II

• Metaphase II

• Anaphase II

• Telophase II

Multiple Choice

What is the result after cytokinesis at the end of meiosis II?

• 4 daughter cells that are genetically identical to the parent cell

• 2 daughter cells that are genetically identical to the parent cell

• 4 diploid daughter cells that are genetically different from each other

• 4 haploid daughter cells that are genetically different from each other

Match

Match the following phases of meiosis with the correct event:

• Prophase I

• Metaphase II

• Prophase II

• Anaphase I

• Telophase II/Cytokinesis II

Crossing-over

Chromosomes consisting of 2 chromatids line up in the middle of the cell

The nuclear membrane starts to disappear and the chromosomes become visible

Homologous chromosome pairs move toward opposite poles

4 haploid daughter cells that are genetically different

• Crossing-over

• Chromosomes consisting of 2 chromatids line up in the middle of the cell

• The nuclear membrane starts to disappear and the chromosomes become visible

• Homologous chromosome pairs move toward opposite poles

• 4 haploid daughter cells that are genetically different

Multiple Choice

What are gametes?

• body cells

• somatic cells

• sex cells

• skin cells

Multiple Choice

What is the first diploid cell called, once fertilization has occurred?

• daughter cell

• blastocyst

• zygote

• parent cell

Match

Match the following:

• sperm

• egg

• zygote

• gamete

• meiosis

male gamete

female gamete

diploid

haploid

formation of gametes

• male gamete

• female gamete

• diploid

• haploid

• formation of gametes