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5| SEX DETERMINATION AND SEX CHROMOSOMES Flashcards

(6 cards)

1
Q

The MSR, male specific region accounts for 95% of the chromosome what two regions does the MSR contain

A

TDF and SRY

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2
Q

A protein encoded by the SRY gene, responsible for male sex initiation is termed

A

TDF

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3
Q

Name four ways to sex in humans can be determined

A
  1. Aneuplodies
  2. the Y chromosome is linked to maleness
  3. PAR regions (autosomal regions in both sexes)
  4. Primordial Germ: Millerian and wolffian (presence/ absence of Y chromosome is key, bi-potential gonads)

;the reproductive system in humans doesn’t occur until fetal development from an undifferentiated zygote

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4
Q

Homologous regions shared between the X and Y chromosomes that recombine during meiosis are termed as

A

Pseudo autosomal regions, PAR

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5
Q

Heritable alterations of the X-inactivation center (located on the q arm), can be defined by

A

Epigenetic inheritance

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6
Q

A protein encoded by a gene in the SRY, triggering testies formation

A

TDF

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