Question

Compare the chromosomal mechanism of sex determination of the following animals.

1. Drosophila

2. Grasshopper

Answer 1

1. XX (female) and XY (male) – Male heterogamety – Male has two sex chromosomes X and Y. Half the sperms with X chromosome and the other Half with a Y chromosome.

2. XX (Female) and XO (male) – Male heterogamety – Male has one Sex chromosome, only X chromosome. Half the sperms with X chromosome and the other half without an X chromosome.