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Biology > Meiosis > Flashcards

Meiosis Flashcards

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1
Q

If a mouse has 20 chromos in a body cell:

How many chromos in its gamete cells

A

10

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2
Q

If a mouse has 20 chromos in a body cell:

what is the mouse’s haploid number

A

10

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3
Q

If a mouse has 20 chromos in a body cell:

What is the mouse’s diploid number

A

20

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4
Q

a 4N mouse would have how many chromos in its gamete cells

A

40

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5
Q

What makes up a tetrad

A

2 pairs of homologous chromos

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6
Q

Compare diploid and haploid

A
  1. gamete/body
  2. n/2n
  3. not paired chromosomes/ paired chromosomes
  4. 46ds/23ss
  5. variety/clone
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7
Q

Why is crossing over during prophase 1 important

A

creates variety

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8
Q

Explain why crossing over in anaphase 1 and anaphase 2 ensures variety among offspring

A

mixes mom’s and dad’s genes together

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9
Q

In what ways are homologous chromosomes similar

A

they are the same in size, shape, and gene location

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10
Q

Why is there no interphase 2

A

we do not to replicate DNA again

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11
Q

Why is there no crossing over in prophase 2

A

there are no homologous chromosomes

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12
Q

If a chromo carried 100 characteristics, how many genes would be found on that chromo

A

100

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13
Q

What is the difference between eggs and polar bodies? What happens to the polar bodies?

A

unequal cytokinesis, egg dies off

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14
Q

How many chromos are in the parent cell (interphase)

A

46ds

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15
Q

How many chromos are in daughter cells (telophase 1)

A

23ds

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16
Q

How many chromos are in daughter cells

telophase 2

A

23ss

17
Q

A horse and a donkey can produce a mule, but the mule is almost always sterile. Horses have a diploid number of 60, and donkeys have a diploid number of 66. What is the explanation for the mule being sterile.

A

The mule would have 63 chromosomes, which is an odd number

18
Q

haploid or diploid

Leaf cell

A

diploid

19
Q

haploid or diploid

sperm cell

A

haploid

20
Q

haploid or diploid

skin cell

A

diploid

21
Q

haploid or diploid

pollen grain

A

haploid

22
Q

what is the name of the process when egg and sperm fuse

A

fertilization

23
Q

is a zygote haploid or diploid

A

diploid

24
Q

why is meiosis known as the reduction division process

A

reduces the number of chromos by half

25
Q

How many chromos should be found in gamete cells of any organism

A

half of the genetic info

26
Q

Contrast meiosis and mitosis

A 
gamete/body
Two divisions/ one division
occurs in body cells/ occurs in tubes or testies
Grow, repair. replace/ reproduce
no variation (mutation/ variation
Clone/ variety

Biology (11 decks)

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