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NEET 2022, Biology Q15: Sex Determination

NEET2022Biology
Q.

XO type of sex determination can be found in :

  1. A

    Drosophila

  2. B

    Birds

  3. C

    Grasshoppers

  4. D

    Monkeys

Solution

The XO mechanism is characteristic of grasshoppers and several other insects. Females are XX (homogametic), while males possess only one X chromosome and no Y, designated XO (heterogametic).

Drosophila and humans (including monkeys) use the XY mechanism; birds use the ZW mechanism.

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