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Biology > 6.6 Meiosis > Flashcards

6.6 Meiosis Flashcards

1
Q

Meiosis

A

A specialized form of cell division in Gonads to produce Gametes

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2
Q

What do chromosomes come in?

A

Homologous pairs

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3
Q

What does a Gamete get?

A

One of each homologous pairs

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4
Q

How are chromosomes visualized?

A

By using a Karyotype

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5
Q

What do human Somatic cells contain?

A

22 pairs of Autosomes and 1 pair of Sex Chromosomes

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6
Q

Are Gametes Haploid or diploid?

A

Haploid or have 1 set of 23 chromosomes

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7
Q

What forms when an egg and a sperm nuclei fuse?

A

A zygote

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8
Q

Is a zygote a Haploid or diploid?

A

Diploid

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9
Q

What other cells are diploid?

A

Somatic or body cells

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10
Q

What does Meiosis start with?

A

Interphase

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11
Q

Interphase

A

DNA is duplicated

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12
Q

What two stages take place during Meiosis?

A

Meiosis I and Meiosis II

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13
Q

Meiosis I

A

Separating out the homologous pairs into 2 separate cells

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14
Q

Meiosis II

A

Separating out the sister chromatids in each cell to produce 4 Haploid cells

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15
Q

Crossing Over

A

Exchange of equivalent portions of chromosome between members of a homologous pair which results in new types of Gametes being formed

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16
Q

Linked Genes

A

Typically cross over together

17
Q

Random Alignment

A

The way in which different pairs of chromosomes align and get separated during Meiosis I is random

18
Q

Nondisjunction

A

Failure of homologues to separate normally during Meiosis

19
Q

What are the results of Nondisjunction?

A

Results in a Gamete having one too many chromosomes (Trisomy) or one too few chromosomes (Monosomy)

20
Q

Do embryos resulting from Nondisjunction survive?

A

No, they die before birth

21
Q

How are cancer mutations passed on to offspring?

A

The mutations must take place in cells that give rise to Gametes

22
Q

Are mutations in Somatic cells heritable?

A

No

Biology (12 decks)

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