Asked in UHS MDCAT 2014 2014Moderate

In male the sex determining gene is

Correct answer: B. SRY

  • A. XY
  • B. SRY
  • C. SYX
  • D. SXX

Explanation

Y chromosome has an SRY gene. It is the sex determining region Y gene. It is Y linked gene because it is found only on the Y chromosome.

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About X-linked Recessive Inheritance

X-linked recessive inheritance involves genes on the X chromosome, so males express a recessive allele with no corresponding allele on their single X chromosome, while females may be carriers. Pedigrees cover haemophilia and red-green colour blindness, including carrier mothers, affected sons and the absence of father-to-son transmission.

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