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Biology 093 > Quiz 4 > Flashcards

Quiz 4 Flashcards

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1
Q

What stage do chromosomes condense and become visible?

A

Prophase.

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2
Q

What stage does the centromere break and sister chromatids separate?

A

Anaphase.

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3
Q

What stage does the nucleolus reappear?

A

Telophase.

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4
Q

What stage do spindle fibres connect to centromeres?

A

Prophase.

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5
Q

When does cytokinesis occur?

A

Telophase.

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6
Q

When do chromosomes line up at centre plate?

A

Metaphase.

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7
Q

When does the nucleus break down?

A

Prophase.

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8
Q

When do centrosomes migrate to either pole?

A

Prophase.

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9
Q

When do chromosomes unwind and are no longer visible?

A

Telophase.

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10
Q

When is the contractile ring active?

A

Telophase.

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11
Q

What meiotic stage does crossing over occur?

A

Prophase 1.

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12
Q

What meiotic stage do homologous chromosomes separate from each other?

A

Anaphase 1.

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13
Q

What meiotic stage does independent assortment occur?

A

Anaphase 1.

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14
Q

What stage do sister chromatids separate and go to opposite cells?

A

Anaphase 2.

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15
Q

Is a cell at the start of meiosis haploid or diploid?

A

2N

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16
Q

Is a cell at the end of mitosis haploid or diploid?

A

2N.

17
Q

Is a cell at the end of meiosis 1 haploid or diploid?

A

N.

18
Q

Is a cell at the end of meiosis 2 haploid or diploid?

A

N.

19
Q

Is a zygote haploid or diploid?

A

2N.

20
Q

Is an egg haploid or diploid?

A

N.

21
Q

What process of meiosis beings at puberty and then goes on through life?

A

Spermatogenesis.

22
Q

What is the first meiotic division that actually occurs when an individual is an infant?

A

Oogenesis.

23
Q

What meiotic stage do polar bodies occur?

A

Oogenesis.

24
Q

Given a cell that has 10 chromosomes, how many chromatids will there be at the start of mitosis?

A

20.

25
Q

Given a cell that has 10 chromosomes, how many chromatids will there be there at the end of mitosis?

A

20.

26
Q

Given a cell that has 10 chromosomes, how many chromatids will there be at the start of meiosis?

A

20.

27
Q

Given a cell that has 10 chromosomes, how many chromatids will there be for each cell at the end of meiosis 1?

A

10.

28
Q

Given a cell that has 10 chromosomes, how many chromatids will there be for each cell at the end of meiosis 2?

A

5.

29
Q

Define centromere.

A

Holds sister chromatids together.

30
Q

Define chromatin.

A

What chromosomes are composed of in loose and unwound stage.

31
Q

Briefly describe crossing over.

A

Homologous chromosomes share DNA with each other, resulting: sister chromatids will no longer be identical.

32
Q

Briefly describe independent assortment.

A

Cant predict what pole chromatids will go to, happens during anaphase. Homologous chromosomes will separate from each other.

33
Q

Outline the process of spermatogenesis.

A

Occurs in the testes of males. Produces sperm. Primary spermatocyte undergoes meiosis 1, turns into 2 secondary spermatocytes. Meiosis 2 occurs and 4 spermatids result which then mature into sperm.

Biology 093 (27 decks)

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