Select the appropriate option for gametogenesis.

An axial filament in the tail of sperm is modified . . . . . . .

Which of the following is an adaptation of sperm in the mammalian testis?

In humans,how many ova can $10$ secondary oocytes produce,and how many secondary spermatocytes are required to produce $40$ spermatozoa?

After ovulation,the ruptured Graafian follicle transforms into which structure?

What is the number of chromosomes in a secondary oocyte?