Fertilisation Flashcards

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1
Q

Fertilisation

A

When the DNA from two gametes combined

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2
Q

Implantation

A

A fertilised egg attaches itself to the lining of the uterus

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3
Q

Copulation

A

The act of mating

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4
Q

Parturition

A

The foetus is expelled from the body

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5
Q

Gestation

A

The length of time between conception and birth

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6
Q

Where does fertilisation occur?

A

It usually occurs in the Fallopian tubes (oviducts) in mammals

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7
Q

Rabbit

A

6.5 days

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8
Q

Dog

A

6-10 days

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9
Q

Cat

A

10-12 days

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10
Q

Pig

A

12-14 days

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11
Q

Cattle

A

30 days

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12
Q

Rabbit gestation length

A

30-32 days

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13
Q

Dog gestation length

A

58-70 days

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14
Q

Cat gestation length

A

61-72 days

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15
Q

Pig gestation length

A

114-115 days

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16
Q

Cow gestation length

A

279-287 days

17
Q

The female hormones in parturition include: 4

A

Progesterone
Oestrogen
Relaxin
Prolactin

18
Q

4 main hormones in the oestrous cycle

A

Luitenising hormone (LH)
Follicle Stimulating Hormone (FSH)
Oestrogen
Progesterone

19
Q

LH

A

Stimulates mature follicle to produce more oestrogen

20
Q

FSH

A

Stimulates one ore more follicles to mature

21
Q

Oestrogen

A

Rebuilds the uterine lining and stimulates the release of LH by the pituitary gland

22
Q

Progesterone

A

Maintains the lining of the uterus ti be ready for the egg. Inhibits the production of FSH by the pituitary gland

23
Q

Polyoestrous animals

A

are fertile more that once a year
Cows, pigs, mice

24
Q

Seasonally polyoestrous

A

More than one oestrous cycle per year but only during certain times
Horses, sheep, deer, goats

25
Q

Monooestrous animals

A

Only have one cycle per year
Dogs, wolves, foxes, bears

26
Q

Melatonin

A

Is a hormone released by the pituitary gland when light levels are high