Meiosis

Meiosis

By R. Marsh Ph.D.

In Meiosis, each pair of chromosomes are called a tetrad, or a bivalent consisting of 4 chromatids. 

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Cross Over: The  exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring. Creates genetic variation.

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Diploid Number; (2N) the total number of chromosomes present in a cell

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Haploid Number; (N) the total number of chromosomes present in a cell​

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Germ Cell: cells that lead to the production of gametes (sex cells) by meiosis

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Gametes: cell with the haploid number of chromosomes.

Gametes are created out of germ cells.

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The sperm and eggs involved in sexual reproduction are gametes

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Meiosis: Prophase 1

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Meiosis: Metaphase 1

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Meiosis: Anaphase 1

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Meiosis: Telophase 1

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Meiosis: PROPHASE 2

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Meiosis: METAPHASE 2

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Meiosis: ANAPHASE 2

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Meiosis: TELOPHASE 2

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Multiple Choice

CROSSING OVER TAKES PLACE DURING

• PROPHASE II

• PROPHASE I

• INTERPHASE

• METAPHASE I

Multiple Choice

• INCREASES GENETIC VARIATION

• TAKES PLACE IN PROPHASE I

• CROSSING OVER

• ALL ARE TRUE

Multiple Choice

NORMAL HUMANS HAVE 46 CHROMOSOMES, HOW MANY WILL THE GERM CELLS HAVE AFTER MEIOSIS?

• 46

• 23

• 12

• 92

Multiple Choice

MEIOSIS PRODUCES 4 CELLS-THE CHROMOSOME NUMBER IS ...

• DIPLOID

• HAPLOID

Multiple Choice

WHAT TYPE OF CELLS STORE THE GENETIC INFORMATION THAT IS PASSED TO OFF-SPRING

• BODY CELLS

• MITOSIS

• EGG

• SPERM

• EGG AND SPERM

Multiple Choice

Females have ____ and males have _____ chromosomes.

• XX, XY
• XY, XX
• XX, XX
• XY, XY

Multiple Choice

The cells produced via meiosis are called:

• sex cells
• somatic cells
• body cells
• skin cells

Multiple Choice

What is it called when a sperm and egg meet?

• meiosis
• fertilization
• cell division
• mitosis

Multiple Choice

Which process and type of resulting cells are represented?

• mitosis, gametes
• mitosis, body cells
• meiosis, gametes
• meiosis, body cells

Multiple Choice

In Metaphase I, tetrads line up along the _______.

• mitotic spindle

• centrosomes

• equatorial plane

• contractile ring

Multiple Choice

In Anaphase I, the _________ are separated by the pulling of the spindle fibers to opposite poles of the cell.

• homologous pairs of chromosomes

• sister chromatids

• centromeres

• centrosomes