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Which one of the following conditions correctly describes the manner of determining the sex in the given example?

  1. A
    Homozygous sex chromosomes (XX) produce male in Drosophila
  2. B
    Homozygous sex chromosomes (ZZ) determine female sex in birds
  3. C
    XO type of sex chromosomes determine male sex in grasshopper
  4. D
    XO condition in humans as found in Turner Syndrome, determines female sex

Solution & Step-by-step Explanation

In grasshoppers and some other insects, sex determination is of the XO type. Males have only one X chromosome (XO) and females have two (XX).Drosophila: XX is female.Birds: ZZ is male, ZW is female.Turner Syndrome (XO) in humans results in a sterile female, but this is a chromosomal disorder, not the standard "manner of determining sex."

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Which one of the following conditions correctly describes the manner of determining the sex in the given example?
A
Homozygous sex chromosomes (XX) produce male in Drosophila
B
Homozygous sex chromosomes (ZZ) determine female sex in birds
C
XO type of sex chromosomes determine male sex in grasshopper
D
XO condition in humans as found in Turner Syndrome, determines female sex

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