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Human Genetics > Meiosis > Flashcards

Meiosis Flashcards

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Biology 101 flashcards
1
Q

synapsis

A

pairing between homologous chromosomes

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2
Q

tetrad

A

forms during prophase, 2 pairs of homolgous chromosomes = 4

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3
Q

chiasmata

A

point of crossing over to exchange genetic material

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4
Q

disjunction

A

replicated chromosomes seperate and move towards poles

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5
Q

spermatogenesis

A

male gamete formation

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6
Q

spermatogonium

A

testicular body cell which undergoes mitosis forming a spermatocyte and a stem cell

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7
Q

spermatocyte

A

after spermatogonium undergoes mitosis, and undergoes meiosis 1 which form 2 secondary spermatocytes

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8
Q

spermatid

A

result of meiosis II which mature and change into sperm. Globs of cytoplasm

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9
Q

sperm

A

mature spermatids

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10
Q

oogenesis

A

female gamete formation

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11
Q

oogonium

A

undergoes mitosis in ovary prior to birth forming 2 primary oocytes

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12
Q

oocytes

A

oogonium that undergoes mitosis which form 2 primary oocytes

-primary oocytes are stuck in prophase 1 until puberty

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13
Q

polar body 1 Q

A

on an oocyte, composed of cytoplasm

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14
Q

Crossing over

A

occurs during prophases I to exchange genetic material

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15
Q

law of independent assortment

A

one cs pair aligns at equator independent of how all other cs pairs align=metaphase I

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16
Q

law of segregation

A

anaphase I= like genes separate during gamete formation so homologous chromosomes separate, one replicated cs going toward each pole

17
Q

interkinesis

A

a resting time where no DNA replication occurs but proteins are made

18
Q

meiosis

A

the formation of gametes, only occurs within the gonads and forms haploid cells

19
Q

ootid

A

fertilized with sperm and another polar body attaches

20
Q

pronuclei

A

when the sperm and egg nuclui fuse to form the zygote

21
Q

zygote

A

fertilized egg

Human Genetics (17 decks)

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