While female and male beetles both contain twenty diploid chromosomes, males have one smaller chromosome than in females. What can be inferred from this observation?
A) Males require fewer genes than females.
B) Crossing over occurs between homologous chromosomes.
C) Biological sex is determined by the presence of an X or Y chromosome.
D) The number of autosomal chromosomes varies between gametes.
E) Chromosomes assort independently to determine biological sex.

Question

Quizplus · Accepted Answer

The presence of a smaller chromosome in males suggests a sex chromosome difference, similar to the X and Y chromosome system in humans, where biological sex is determined by the presence of an X or Y chromosome.

While Female and Male Beetles Both Contain Twenty Diploid Chromosomes