tetrad造句怎么写

At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.

The megasporocyte undergoes meiosis and gives rise to a linear or a"T" shaped tetrad of megaspore, the chalazal megaspore was functional.

Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.

Microspore abortion occurred after the tetrad formation.

Our main results were as follows: the ovary of male I degenerated and disappeared quickly upon megaspore tetrad degeneration, and developed into macrosporocytes;