Question

When cells of a $15$-celled filament of Spirogyra participate in indirect lateral conjugation, the maximum number of zygospores produced is

• A. $15$
• B. $14$
• C. $8$
• D. $7$

Answer 1

The correct option is D $7$

In lateral conjugation, gametes are produced in a single filament. A pair of adjoining cells near the common transverse wall produce bridge called conjugation tubes, which further develop to conjugation canal upon contact. The male cytoplasm move through the conjugation canal, fusing with the female and the tranfer of genetic material takes place. In a 15 celled filament of Spirogyra , which participate in indirect lateral conjugation maximum possible number of zygospore produced is 7

Thus, the correct answer is option D.