Meiosis - sex cell formation Flashcards

1
Q

Asexual reproduction

A

offspring only produce by one parent cell. All of the DNA is passed onto the identical offspring

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2
Q

Sexual reproduction

A

requires two parents (male and Female) each passing on half of their genes to the offspring; offspring is not genetically identical to either parent

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3
Q

Diploid

A

two copies of each chromosome in the cell

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4
Q

Haploid

A

one copy of each chromosome in the cell

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5
Q

Common name for somatic cells

A

body cells

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6
Q

Common name for sex cells

A

gametes

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7
Q

Number of human HAPLOID chromosomes

A

23

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8
Q

Number of human DIPLOID chromosomes

A

46

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9
Q

Male Chromosomes

A

XY

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10
Q

Female Chromosomes

A

XX

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11
Q

How are somatic cells made

A

via mitosis

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12
Q

How are gametes made

A

via meiosis

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13
Q

Where does meiosis located?

A

in the sex organs.
(Male = testes)
(Female = Ovaries)

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14
Q

What is the purpose of Meiosis?

A
  1. form gametes
  2. increase genetic diversity
  3. reduce the number of chromosomes in half
  4. create 4 haploid cells from 1diploid cell
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15
Q

Stages is Meiosis

A
  1. Interphase
  2. Meiosis I
  3. Meiosis II
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16
Q

What are in the stages in interphase?

A

G1 - gap 1
S - synthesis
G2 - gap 2

17
Q

What happens in meiosis i

A

1st round of cell division; divides the homologous chromosomes; end result = two new cells

18
Q

What happends in meiosis II

A

2nd round of cell division; sister chromatids are separated; looks like mitosis ; end result : 4 cells (gametes)

19
Q

how many times do the cells go through interphase?

A

1