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Genetics > 14) Sex determination in mammals and birds > Flashcards

14) Sex determination in mammals and birds Flashcards

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Biology 101 flashcards
1
Q

Sex ratio =

A

50% male

50% female

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2
Q

How many X chromosomes does each individual possess

A

At least 1

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3
Q

Primary sex

A

Strictly chromosomal:

  • Female XX
  • Male XY
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4
Q

Secondary Sex

A
  • Affect body phenotype/gonads
  • Male:
    • Penis
    • Prostate
    • Seminal vesicle
  • Female:
    • Vagina
    • Uterus
    • Cervix
    • Mammary glands
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5
Q

Tertiary sex

A

External characteristics

Rooster: comb etc

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Genetics (60 decks)

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