Draw and labelled diagram to illustrate the structure of the gonosomes in a male somatic cell

X Chromosome: This is a relatively large chromosome, often appearing submetacentric (with the centromere slightly off-center). It consists of two identical sister chromatids joined at the centromere. Each chromatid has a short arm (p arm) and a long arm (q arm).

Y Chromosome: This is a much smaller chromosome compared to the X, typically acrocentric (with the centromere very close to one end). Like the X, it also has two sister chromatids joined at a centromere, with a distinct short arm (p arm) and long arm (q arm). The SRY gene, which is crucial for male development, is located on the short arm of the Y chromosome.

Key Labels for the Diagram:

• X chromosome
• Y chromosome
• Centromere (the constricted region joining sister chromatids)
• Sister chromatids (the two identical halves of a replicated chromosome)
• Short arm (p arm)
• Long arm (q arm)
• SRY gene (located on the Y chromosome's short arm)