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BIO 189 > Ch. 9: Meiosis and Sexual Reproduction > Flashcards

Ch. 9: Meiosis and Sexual Reproduction Flashcards

1
Q

What type of cells undergo mitosis?

A

Somatic

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2
Q

What type of cell division involves splitting a diploid cell into 4 haploid cells.

A

Meiosis

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3
Q

What step of meiosis does DNA condense into chromosomes?

A

Prophase I

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4
Q

What are the steps of meiosis:

A

Interphase, prophase, metaphase, anaphase, telophase, cytokinesis

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5
Q

What step involves DNA replication?

A

Interphase

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6
Q

What are the 3 ways that genetic variation occurs during meiosis?

A

Crossing over, random variation during metaphase, random fertilization

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7
Q

Which type of cell division involves the alignment of HOMOLOGOUS chromosomes?

A

Meiosis

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8
Q

(T/F) Mitosis divides both haploid and diploid cells

A

TRUE

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9
Q

What type of cell has one or more complete sets of extra chromosomes?

A

Polyploid cell

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10
Q

What is non disjunction occurance in cells?

A

During anaphase, chromosomes don’t divide

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11
Q

What is a diploid cell and how is it represented?

A

2n, cell with two complete sets of chromosomes

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12
Q

What stage does crossing over happen in?

A

Prophase I

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13
Q

What is the result of nondisjunction?

A

Extra X or Y

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14
Q

When does mitosis occur?

A

During growth or development

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15
Q

When does meiosis occur?

A

Creation of gametes

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16
Q

How many chromosomes are in haploid cells?

A

23

17
Q

When do sister chromatid separate?

A

anaphase II

18
Q

How does independant assortment work?

A

Chromosome pairs randomly allign during metaphase I, resulting in haploid cells with different variations of chromosomes

19
Q

Identical vs. Fraternal Twins?

A

Identical: 1 egg
Fraternal: 2 eggs

20
Q

What is aneuploidy?

A

Extra or missing chromsomes

  1. Turner Syndrom 1 X
  2. Kleinfelter: XXY
21
Q

What is polyploidy?

A

Extra complete set of chromsomes.

BIO 189 (13 decks)

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