Discuss the mechanism of sex determination in Drosophillia.
X chromosomesAutosomesRatio of X:ASexXXXXAAAA1Normal FemaleXXXAAA1Normal FemaleXXYAA1Normal FemaleXXYYAA1Normal FemaleXXAA1Normal FemaleXYAA0.50Normal maleXAA0.50Normal Male (sterile)
The XO sex-determination system is a system that determines the sex of offsprings among grasshoppers, crickets, cockroaches and some other insects. In this system, there is only one sex chromosome, referred to as X. Males have only one X chromosome (X0), while females have two (XX). The zero (sometimes, the letter O) signifies the lack of a second X. Maternal gametes always contain an X chromosome, so the sex of the animal's offspring depends on whether a sex chromosome is present in the male gamete. Its sperm normally contains either one X chromosome or no sex chromosomes at all.
X chromosomesAutosomesRatio of X:ASexXXXXAAAA1Normal FemaleXXXAAA1Normal FemaleXXYAA1Normal FemaleXXYYAA1Normal FemaleXXAA1Normal FemaleXYAA0.50Normal maleXAA0.50Normal Male (sterile)
The XO sex-determination system is a system that determines the sex of offsprings among grasshoppers, crickets, cockroaches and some other insects. In this system, there is only one sex chromosome, referred to as X. Males have only one X chromosome (X0), while females have two (XX). The zero (sometimes, the letter O) signifies the lack of a second X. Maternal gametes always contain an X chromosome, so the sex of the animal's offspring depends on whether a sex chromosome is present in the male gamete. Its sperm normally contains either one X chromosome or no sex chromosomes at all.
