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Biology of Mammals > L3: Reproduction > Flashcards

L3: Reproduction Flashcards

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1
Q

Viviparity

A

Birth of live young

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2
Q

Why are animals able to lose the shell of their egg?

A

Retain egg in oviduct, protection not needed, able to transfer nutrients

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3
Q

What two things are characteristics of mammals??

A

Hair, mammary glands

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4
Q

What does diphyodont mean?

A

Mammals that grow two sets of teeth in their lifetime

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5
Q

Describe the monotremes.

A

Egg laying, single functioning ovary, cloaca, mammary glands, no nipples

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6
Q

Describe the marsupials.

A

Cloaca, basic placenta, brief gestation, long lactation, develop in pouch

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7
Q

Describe the eutherians.

A

Advanced placentas, longer gestation, shorter lactation

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8
Q

Which order of mammal had a bifid penis?

A

Marsupials

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9
Q

What is unique about marsupial vaginas?

A

It splits into two.

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10
Q

What are the uses of epithelial spines?

A

Multiple matings, remove copulatory plugs, sperm competition, ejaculate volume

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11
Q

What kind of uterus would a rodent have?

A

Duplex

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12
Q

What kind of uterus would a whale have?

A

Bipartite

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13
Q

What kind of uterus would a bat have?

A

Bicornuate

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14
Q

What kind of uterus would a primate have?

A

Simplex

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15
Q

What does ‘altricial’ mean?

A

Underdeveloped young

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16
Q

What does ‘precocial’ mean?

A

Well-developed young

17
Q

Which animals have facultative delayed implantation?

A

Rodents, insectivores, marsupials

18
Q

What is facultative delayed implantation regulated by?

A

Lactation

19
Q

Which animals have obligate delayed implantation?

A

Mustelids, bears, roe deer

20
Q

Name the three stages of lactation in metatheria

A

Mammogenesis, early lactogenesis, late lactogenesis

21
Q

Describe the ‘Bruce Effect’.

A

Rodent females tend to abort their pregnancy in the presences of the smell of a strange male. Murids, Geladas

22
Q

Describe ‘polyandry’.

A

Multiple males, single breeding female

23
Q

Describe ‘polgyny’.

A

Multiple females with a harem male

Biology of Mammals (5 decks)

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